diff --git a/Tests/Cosmos.Compiler.Tests.Bcl/System/Collections/Generic/ListTest.cs b/Tests/Cosmos.Compiler.Tests.Bcl/System/Collections/Generic/ListTest.cs
index c3090a0c6..4a3e6294b 100644
--- a/Tests/Cosmos.Compiler.Tests.Bcl/System/Collections/Generic/ListTest.cs
+++ b/Tests/Cosmos.Compiler.Tests.Bcl/System/Collections/Generic/ListTest.cs
@@ -38,12 +38,28 @@ namespace Cosmos.Compiler.Tests.Bcl.System.Collections.Generic
             Assert.AreEqual(1, xList[2], "List<int>.Insert: xList[2] != 1");
             Assert.AreEqual(2, xList[3], "List<int>.Insert: xList[3] != 2");
 
+            xList.Insert(0, 7);
+
+            Assert.AreEqual(7, xList[0], "List<int>.Insert: xList[0] != 7");
+            Assert.AreEqual(0, xList[1], "List<int>.Insert: xList[1] != 0");
+            Assert.AreEqual(5, xList[2], "List<int>.Insert: xList[2] != 5");
+            Assert.AreEqual(1, xList[3], "List<int>.Insert: xList[3] != 1");
+            Assert.AreEqual(2, xList[4], "List<int>.Insert: xList[4] != 2");
+
             xList.RemoveAt(2);
 
+            Assert.AreEqual(7, xList[0], "List<int>.RemoveAt: xList[0] != 7");
+            Assert.AreEqual(0, xList[1], "List<int>.RemoveAt: xList[1] != 0");
+            Assert.AreEqual(1, xList[2], "List<int>.RemoveAt: xList[2] != 1");
+            Assert.AreEqual(2, xList[3], "List<int>.RemoveAt: xList[3] != 2");
+
+            xList.RemoveAt(0);
+
             Assert.AreEqual(0, xList[0], "List<int>.RemoveAt: xList[0] != 0");
-            Assert.AreEqual(5, xList[1], "List<int>.RemoveAt: xList[1] != 5");
+            Assert.AreEqual(1, xList[1], "List<int>.RemoveAt: xList[1] != 1");
             Assert.AreEqual(2, xList[2], "List<int>.RemoveAt: xList[2] != 2");
 
+
             // Commented tests depend on #583
 
             //xList.AddRange(new List<int>() { 3, 4, 5 });
diff --git a/source/Cosmos.Core_Asm/Array/ArrayInternalCopyAsm.cs b/source/Cosmos.Core_Asm/Array/ArrayInternalCopyAsm.cs
index 63a4a0502..bdb52225e 100644
--- a/source/Cosmos.Core_Asm/Array/ArrayInternalCopyAsm.cs
+++ b/source/Cosmos.Core_Asm/Array/ArrayInternalCopyAsm.cs
@@ -71,22 +71,15 @@ namespace Cosmos.Core_Asm
             XS.Multiply(EDX);
             XS.Set(ECX, EAX);
 
-            // if source and destination are equal, jump to end
-            XS.Set(EAX, ESI);
-            XS.Add(EAX, ECX);
-            XS.Compare(EDI, EAX);
-            XS.Jump(ConditionalTestEnum.Equal, xArrayCopyEndLabel);
-            XS.Jump(ConditionalTestEnum.LessThanOrEqualTo, xArrayCopyReverseLabel);
+            XS.Compare(EDI, ESI);
+            XS.Jump(ConditionalTestEnum.GreaterThan, xArrayCopyReverseLabel);
 
             new Movs { Size = 8, Prefixes = InstructionPrefixes.Repeat };
 
             XS.Jump(xArrayCopyEndLabel);
 
-            // source ptr + size >= destination ptr
             XS.Label(xArrayCopyReverseLabel);
 
-            XS.Comment("Array Reverse Copy: source ptr + size >= destination ptr");
-
             XS.Add(ESI, ECX);
             XS.Add(EDI, ECX);