diff --git a/Code/Framework/AzCore/AzCore/Serialization/Json/JsonMerger.cpp b/Code/Framework/AzCore/AzCore/Serialization/Json/JsonMerger.cpp
index de9aa70362..db1172d245 100644
--- a/Code/Framework/AzCore/AzCore/Serialization/Json/JsonMerger.cpp
+++ b/Code/Framework/AzCore/AzCore/Serialization/Json/JsonMerger.cpp
@@ -607,10 +607,12 @@ namespace AZ
             }
             else if (source.Size() > target.Size())
             {
-                rapidjson::SizeType sourceCount = source.Size();
-                for (rapidjson::SizeType i = count; i < sourceCount; ++i)
+                // Loop backwards through the removals so that each removal has a valid index when processing in order.
+                for (rapidjson::SizeType i = source.Size(); i > count; --i)
                 {
-                    ScopedStackedString entryName(element, i);
+                    // (We use "i - 1" here instead of in the loop to ensure we don't wrap around our unsigned numbers in the case
+                    // where count is 0.)
+                    ScopedStackedString entryName(element, i - 1);
                     patch.PushBack(CreatePatchInternal_Remove(allocator, element), allocator);
                     resultCode.Combine(settings.m_reporting("Removed member from array in JSON Patch.",
                         ResultCode(Tasks::CreatePatch, Outcomes::Success), element));
diff --git a/Code/Framework/AzCore/Tests/Serialization/Json/TestCases_Patching.cpp b/Code/Framework/AzCore/Tests/Serialization/Json/TestCases_Patching.cpp
index 0906eb45f8..1f6c6142e8 100644
--- a/Code/Framework/AzCore/Tests/Serialization/Json/TestCases_Patching.cpp
+++ b/Code/Framework/AzCore/Tests/Serialization/Json/TestCases_Patching.cpp
@@ -303,6 +303,29 @@ namespace JsonSerializationTests
             R"( { "foo": [ "bar", "baz" ] })");
     }
 
+    TEST_F(JsonPatchingSerializationTests, ApplyPatch_UseJsonPatchRemoveArrayMembersInCorrectOrder_ReportsSuccess)
+    {
+        CheckApplyPatch(
+            R"( { "foo": [ "bar", "qux", "baz" ] })",
+            R"( [
+                    { "op": "remove", "path": "/foo/2" },
+                    { "op": "remove", "path": "/foo/1" }
+                ])",
+            R"( { "foo": [ "bar" ] })");
+    }
+
+    TEST_F(JsonPatchingSerializationTests, ApplyPatch_UseJsonPatchRemoveArrayMembersInWrongOrder_ReportsError)
+    {
+        using namespace AZ::JsonSerializationResult;
+        CheckApplyPatchOutcome(
+            R"( { "foo": [ "bar", "qux", "baz" ] })",
+            R"( [
+                    { "op": "remove", "path": "/foo/1" },
+                    { "op": "remove", "path": "/foo/2" }
+                ])",
+            Outcomes::Invalid, Processing::Halted);
+    }
+
     TEST_F(JsonPatchingSerializationTests, ApplyPatch_UseJsonPatchRemoveOperationInvalidParent_ReportError)
     {
         using namespace AZ::JsonSerializationResult;
@@ -949,6 +972,27 @@ namespace JsonSerializationTests
         );
     }
 
+    TEST_F(JsonPatchingSerializationTests, CreatePatch_UseJsonPatchRemoveLastArrayEntries_MultipleOperationsInCorrectOrder)
+    {
+        CheckCreatePatch(
+            R"( [ "foo", "hello", "bar" ])", R"( [ "foo" ])",
+            R"( [
+                    { "op": "remove", "path": "/2" },
+                    { "op": "remove", "path": "/1" }
+                ])");
+    }
+
+    TEST_F(JsonPatchingSerializationTests, CreatePatch_UseJsonPatchRemoveAllArrayEntries_MultipleOperationsInCorrectOrder)
+    {
+        CheckCreatePatch(
+            R"( [ "foo", "hello", "bar" ])", R"( [])",
+            R"( [
+                    { "op": "remove", "path": "/2" },
+                    { "op": "remove", "path": "/1" },
+                    { "op": "remove", "path": "/0" }
+                ])");
+    }
+
     TEST_F(JsonPatchingSerializationTests, CreatePatch_UseJsonPatchRemoveObjectFromArrayInMiddle_OperationToUpdateMember)
     {
         CheckCreatePatch(
diff --git a/Code/Tools/SerializeContextTools/SliceConverter.cpp b/Code/Tools/SerializeContextTools/SliceConverter.cpp
index e7dc49d5b3..70412e23bc 100644
--- a/Code/Tools/SerializeContextTools/SliceConverter.cpp
+++ b/Code/Tools/SerializeContextTools/SliceConverter.cpp
@@ -385,24 +385,36 @@ namespace AZ
                     return false;
                 }
 
-                // Now, convert the nested slice to a prefab.
-                bool nestedSliceResult = ConvertSliceFile(serializeContext, assetPath, isDryRun);
-                if (!nestedSliceResult)
-                {
-                    AZ_Warning("Convert-Slice", nestedSliceResult, "  Nested slice '%s' could not be converted.", assetPath.c_str());
-                    return false;
-                }
+                // Check to see if we've already converted this slice at a higher level of slice nesting, or if this is our first
+                // occurrence and we need to convert it now.
 
-                // Find the prefab template we created for the newly-created nested prefab.
-                // To get the template, we need to take our absolute slice path and turn it into a project-relative prefab path.
+                // First, take our absolute slice path and turn it into a project-relative prefab path.
                 AZ::IO::Path nestedPrefabPath = assetPath;
                 nestedPrefabPath.ReplaceExtension("prefab");
 
                 auto prefabLoaderInterface = AZ::Interface<AzToolsFramework::Prefab::PrefabLoaderInterface>::Get();
                 nestedPrefabPath = prefabLoaderInterface->GenerateRelativePath(nestedPrefabPath);
 
+                // Now, see if we already have a template ID in memory for it.
                 AzToolsFramework::Prefab::TemplateId nestedTemplateId =
                     prefabSystemComponentInterface->GetTemplateIdFromFilePath(nestedPrefabPath);
+
+                // If we don't have a template ID yet, convert the nested slice to a prefab and get the template ID.
+                if (nestedTemplateId == AzToolsFramework::Prefab::InvalidTemplateId)
+                {
+                    bool nestedSliceResult = ConvertSliceFile(serializeContext, assetPath, isDryRun);
+                    if (!nestedSliceResult)
+                    {
+                        AZ_Warning("Convert-Slice", nestedSliceResult, "  Nested slice '%s' could not be converted.", assetPath.c_str());
+                        return false;
+                    }
+
+                    nestedTemplateId = prefabSystemComponentInterface->GetTemplateIdFromFilePath(nestedPrefabPath);
+                    AZ_Assert(nestedTemplateId != AzToolsFramework::Prefab::InvalidTemplateId,
+                        "Template ID for %s is invalid", nestedPrefabPath.c_str());
+                }
+
+                // Get the nested prefab template.
                 AzToolsFramework::Prefab::TemplateReference nestedTemplate =
                     prefabSystemComponentInterface->FindTemplate(nestedTemplateId);