diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/ListAttachState.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/ListAttachState.kt
index 945bc72..9e5dab1 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/ListAttachState.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/ListAttachState.kt
@@ -68,9 +68,6 @@
      */
     var stableIndex: Int = -1
 
-    /** Access the index of the [section] or -1 if the entry does not have one */
-    val sectionIndex: Int get() = section?.index ?: -1
-
     /** Copies the state of another instance. */
     fun clone(other: ListAttachState) {
         parent = other.parent
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/ShadeListBuilder.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/ShadeListBuilder.java
index 5198d82..075a0dc 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/ShadeListBuilder.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/ShadeListBuilder.java
@@ -1039,25 +1039,22 @@
         NotifSection currentSection = requireNonNull(notifList.get(0).getSection());
         int sectionMemberIndex = 0;
         for (int i = 0; i < notifList.size(); i++) {
-            final ListEntry entry = notifList.get(i);
+            ListEntry entry = notifList.get(i);
             NotifSection section = requireNonNull(entry.getSection());
             if (section.getIndex() != currentSection.getIndex()) {
                 sectionMemberIndex = 0;
                 currentSection = section;
             }
-            entry.getAttachState().setStableIndex(sectionMemberIndex++);
+            entry.getAttachState().setStableIndex(sectionMemberIndex);
             if (entry instanceof GroupEntry) {
-                final GroupEntry parent = (GroupEntry) entry;
-                final NotificationEntry summary = parent.getSummary();
-                if (summary != null) {
-                    summary.getAttachState().setStableIndex(sectionMemberIndex++);
-                }
-                final List<NotificationEntry> children = parent.getChildren();
-                for (int j = 0; j < children.size(); j++) {
-                    final NotificationEntry child = children.get(j);
-                    child.getAttachState().setStableIndex(sectionMemberIndex++);
+                GroupEntry parent = (GroupEntry) entry;
+                for (int j = 0; j < parent.getChildren().size(); j++) {
+                    entry = parent.getChildren().get(j);
+                    entry.getAttachState().setStableIndex(sectionMemberIndex);
+                    sectionMemberIndex++;
                 }
             }
+            sectionMemberIndex++;
         }
     }
 
@@ -1197,9 +1194,9 @@
                 o2.getSectionIndex());
         if (cmp != 0) return cmp;
 
-        cmp = Integer.compare(
-                getStableOrderIndex(o1),
-                getStableOrderIndex(o2));
+        int index1 = canReorder(o1) ? -1 : o1.getPreviousAttachState().getStableIndex();
+        int index2 = canReorder(o2) ? -1 : o2.getPreviousAttachState().getStableIndex();
+        cmp = Integer.compare(index1, index2);
         if (cmp != 0) return cmp;
 
         NotifComparator sectionComparator = getSectionComparator(o1, o2);
@@ -1213,32 +1210,31 @@
             if (cmp != 0) return cmp;
         }
 
-        cmp = Integer.compare(
-                o1.getRepresentativeEntry().getRanking().getRank(),
-                o2.getRepresentativeEntry().getRanking().getRank());
+        final NotificationEntry rep1 = o1.getRepresentativeEntry();
+        final NotificationEntry rep2 = o2.getRepresentativeEntry();
+            cmp = rep1.getRanking().getRank() - rep2.getRanking().getRank();
         if (cmp != 0) return cmp;
 
-        cmp = -1 * Long.compare(
-                o1.getRepresentativeEntry().getSbn().getNotification().when,
-                o2.getRepresentativeEntry().getSbn().getNotification().when);
+        cmp = Long.compare(
+                rep2.getSbn().getNotification().when,
+                rep1.getSbn().getNotification().when);
         return cmp;
     };
 
 
     private final Comparator<NotificationEntry> mGroupChildrenComparator = (o1, o2) -> {
-        int cmp = Integer.compare(
-                getStableOrderIndex(o1),
-                getStableOrderIndex(o2));
+        int index1 = canReorder(o1) ? -1 : o1.getPreviousAttachState().getStableIndex();
+        int index2 = canReorder(o2) ? -1 : o2.getPreviousAttachState().getStableIndex();
+        int cmp = Integer.compare(index1, index2);
         if (cmp != 0) return cmp;
 
-        cmp = Integer.compare(
-                o1.getRepresentativeEntry().getRanking().getRank(),
-                o2.getRepresentativeEntry().getRanking().getRank());
+        cmp = o1.getRepresentativeEntry().getRanking().getRank()
+                - o2.getRepresentativeEntry().getRanking().getRank();
         if (cmp != 0) return cmp;
 
-        cmp = -1 * Long.compare(
-                o1.getRepresentativeEntry().getSbn().getNotification().when,
-                o2.getRepresentativeEntry().getSbn().getNotification().when);
+        cmp = Long.compare(
+                o2.getRepresentativeEntry().getSbn().getNotification().when,
+                o1.getRepresentativeEntry().getSbn().getNotification().when);
         return cmp;
     };
 
@@ -1248,21 +1244,8 @@
      */
     private boolean mForceReorderable = false;
 
-    private int getStableOrderIndex(ListEntry entry) {
-        if (mForceReorderable) {
-            // this is used to determine if the list is correctly sorted
-            return -1;
-        }
-        if (getStabilityManager().isEntryReorderingAllowed(entry)) {
-            // let the stability manager constrain or allow reordering
-            return -1;
-        }
-        if (entry.getAttachState().getSectionIndex()
-                != entry.getPreviousAttachState().getSectionIndex()) {
-            // stable index is only valid within the same section; otherwise we allow reordering
-            return -1;
-        }
-        return entry.getPreviousAttachState().getStableIndex();
+    private boolean canReorder(ListEntry entry) {
+        return mForceReorderable || getStabilityManager().isEntryReorderingAllowed(entry);
     }
 
     private boolean applyFilters(NotificationEntry entry, long now, List<NotifFilter> filters) {
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/collection/ShadeListBuilderTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/collection/ShadeListBuilderTest.java
index c283cec..dfa38ab 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/collection/ShadeListBuilderTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/collection/ShadeListBuilderTest.java
@@ -33,7 +33,6 @@
 import static org.mockito.Mockito.atLeastOnce;
 import static org.mockito.Mockito.clearInvocations;
 import static org.mockito.Mockito.inOrder;
-import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
@@ -1846,103 +1845,6 @@
     }
 
     @Test
-    public void stableOrderingDisregardedWithSectionChange() {
-        // GIVEN the first sectioner's packages can be changed from run-to-run
-        List<String> mutableSectionerPackages = new ArrayList<>();
-        mutableSectionerPackages.add(PACKAGE_1);
-        mListBuilder.setSectioners(asList(
-                new PackageSectioner(mutableSectionerPackages, null),
-                new PackageSectioner(List.of(PACKAGE_1, PACKAGE_2, PACKAGE_3), null)));
-        mStabilityManager.setAllowEntryReordering(false);
-
-        // WHEN the list is originally built with reordering disabled (and section changes allowed)
-        addNotif(0, PACKAGE_1).setRank(1);
-        addNotif(1, PACKAGE_1).setRank(5);
-        addNotif(2, PACKAGE_2).setRank(2);
-        addNotif(3, PACKAGE_2).setRank(3);
-        addNotif(4, PACKAGE_3).setRank(4);
-        dispatchBuild();
-
-        // VERIFY the order and that entry reordering has not been suppressed
-        verifyBuiltList(
-                notif(0),
-                notif(1),
-                notif(2),
-                notif(3),
-                notif(4)
-        );
-        verify(mStabilityManager, never()).onEntryReorderSuppressed();
-
-        // WHEN the first section now claims PACKAGE_3 notifications
-        mutableSectionerPackages.add(PACKAGE_3);
-        dispatchBuild();
-
-        // VERIFY the re-sectioned notification is inserted at the top of the first section, because
-        // it's effectively "new" and "new" things are inserted at the top of their section.
-        verifyBuiltList(
-                notif(4),
-                notif(0),
-                notif(1),
-                notif(2),
-                notif(3)
-        );
-        verify(mStabilityManager).onEntryReorderSuppressed();
-        clearInvocations(mStabilityManager);
-
-        // WHEN reordering is now allowed again
-        mStabilityManager.setAllowEntryReordering(true);
-        dispatchBuild();
-
-        // VERIFY that list order changes to put the re-sectioned notification in the middle where
-        // it is ranked.
-        verifyBuiltList(
-                notif(0),
-                notif(4),
-                notif(1),
-                notif(2),
-                notif(3)
-        );
-        verify(mStabilityManager, never()).onEntryReorderSuppressed();
-    }
-
-    @Test
-    public void groupRevertingToSummaryRetainsStablePosition() {
-        // GIVEN a notification group is on screen
-        mStabilityManager.setAllowEntryReordering(false);
-
-        // WHEN the list is originally built with reordering disabled (and section changes allowed)
-        addNotif(0, PACKAGE_1).setRank(2);
-        addNotif(1, PACKAGE_1).setRank(3);
-        addGroupSummary(2, PACKAGE_1, "group").setRank(4);
-        addGroupChild(3, PACKAGE_1, "group").setRank(5);
-        addGroupChild(4, PACKAGE_1, "group").setRank(6);
-        dispatchBuild();
-
-        verifyBuiltList(
-                notif(0),
-                notif(1),
-                group(
-                        summary(2),
-                        child(3),
-                        child(4)
-                )
-        );
-
-        // WHEN the notification summary rank increases and children removed
-        setNewRank(notif(2).entry, 1);
-        mEntrySet.remove(4);
-        mEntrySet.remove(3);
-        dispatchBuild();
-
-        // VERIFY the summary stays in the same location on rebuild
-        verifyBuiltList(
-                notif(0),
-                notif(1),
-                notif(2)
-        );
-    }
-
-    @Test
     public void testStableChildOrdering() {
         // WHEN the list is originally built with reordering disabled
         mStabilityManager.setAllowEntryReordering(false);
@@ -2138,7 +2040,6 @@
 
     private void assertOrder(String visible, String active, String expected) {
         StringBuilder differenceSb = new StringBuilder();
-        NotifSection section = new NotifSection(mock(NotifSectioner.class), 0);
         for (char c : active.toCharArray()) {
             if (visible.indexOf(c) < 0) differenceSb.append(c);
         }
@@ -2147,7 +2048,6 @@
         for (int i = 0; i < visible.length(); i++) {
             addNotif(i, String.valueOf(visible.charAt(i)))
                     .setRank(active.indexOf(visible.charAt(i)))
-                    .setSection(section)
                     .setStableIndex(i);
 
         }
@@ -2155,7 +2055,6 @@
         for (int i = 0; i < difference.length(); i++) {
             addNotif(i + visible.length(), String.valueOf(difference.charAt(i)))
                     .setRank(active.indexOf(difference.charAt(i)))
-                    .setSection(section)
                     .setStableIndex(-1);
         }