diff --git a/SabreTools.DatFiles/DatFile.cs b/SabreTools.DatFiles/DatFile.cs
index ac0ce347..076b2976 100644
--- a/SabreTools.DatFiles/DatFile.cs
+++ b/SabreTools.DatFiles/DatFile.cs
@@ -1123,12 +1123,13 @@ namespace SabreTools.DatFiles
         /// <returns>True if it sorted correctly, false otherwise</returns>
         private static bool Sort(ref List<DatItem> items, bool norename)
         {
+            // Create the comparer extenal to the delegate
+            var nc = new NaturalComparer();
+            
             items.Sort(delegate (DatItem x, DatItem y)
             {
                 try
                 {
-                    var nc = new NaturalComparer();
-
                     // If machine names don't match
                     string? xMachineName = x.GetMachine()?.GetName();
                     string? yMachineName = y.GetMachine()?.GetName();
@@ -1176,12 +1177,13 @@ namespace SabreTools.DatFiles
         /// <returns>True if it sorted correctly, false otherwise</returns>
         private static bool SortDB(ref List<KeyValuePair<long, DatItem>> mappings, bool norename)
         {
+            // Create the comparer extenal to the delegate
+            var nc = new NaturalComparer();
+            
             mappings.Sort(delegate (KeyValuePair<long, DatItem> x, KeyValuePair<long, DatItem> y)
             {
                 try
                 {
-                    var nc = new NaturalComparer();
-
                     // TODO: Fix this since DB uses an external map for machines
 
                     // If machine names don't match
diff --git a/SabreTools.DatFiles/ItemDictionary.cs b/SabreTools.DatFiles/ItemDictionary.cs
index 322c3d78..ee4586d5 100644
--- a/SabreTools.DatFiles/ItemDictionary.cs
+++ b/SabreTools.DatFiles/ItemDictionary.cs
@@ -398,7 +398,7 @@ namespace SabreTools.DatFiles
                 List<DatItem> sortedList = GetItemsForBucket(key);
 
                 // Sort and merge the list
-                Sort(ref sortedList, false);
+                Sort(ref sortedList);
                 sortedList = Merge(sortedList);
 
                 // Add the list back to the dictionary
@@ -798,7 +798,7 @@ namespace SabreTools.DatFiles
                 List<DatItem> sortedList = GetItemsForBucket(key);
 
                 // Sort the list of items to be consistent
-                Sort(ref sortedList, false);
+                Sort(ref sortedList);
 
                 // Add the list back to the dictionary
                 RemoveBucket(key);
@@ -814,15 +814,22 @@ namespace SabreTools.DatFiles
         /// Sort a list of DatItem objects by SourceID, Game, and Name (in order)
         /// </summary>
         /// <param name="items">List of DatItem objects representing the items to be sorted</param>
-        /// <param name="norename">True if files are not renamed, false otherwise</param>
         /// <returns>True if it sorted correctly, false otherwise</returns>
-        private bool Sort(ref List<DatItem> items, bool norename)
+        private bool Sort(ref List<DatItem> items)
         {
+            // Create the comparer extenal to the delegate
+            var nc = new NaturalComparer();
+            
+            // Sort by machine, type, item name, and source
             items.Sort(delegate (DatItem x, DatItem y)
             {
                 try
                 {
-                    var nc = new NaturalComparer();
+                    // Compare on source
+                    int xSourceIndex = x.GetFieldValue<Source?>(DatItem.SourceKey)?.Index ?? 0;
+                    int ySourceIndex = y.GetFieldValue<Source?>(DatItem.SourceKey)?.Index ?? 0;
+                    if (xSourceIndex != ySourceIndex)
+                        return xSourceIndex - ySourceIndex;
 
                     // Get the machines
                     Machine? xMachine = x.GetMachine();
@@ -849,13 +856,7 @@ namespace SabreTools.DatFiles
                     // If item names don't match
                     string? xName = Path.GetFileName(TextHelper.RemovePathUnsafeCharacters(x.GetName() ?? string.Empty));
                     string? yName = Path.GetFileName(TextHelper.RemovePathUnsafeCharacters(y.GetName() ?? string.Empty));
-                    if (xName != yName)
-                        return nc.Compare(xName, yName);
-
-                    // Otherwise, compare on machine or source, depending on the flag
-                    int? xSourceIndex = x.GetFieldValue<Source?>(DatItem.SourceKey)?.Index;
-                    int? ySourceIndex = y.GetFieldValue<Source?>(DatItem.SourceKey)?.Index;
-                    return (norename ? nc.Compare(xMachineName, yMachineName) : (xSourceIndex - ySourceIndex) ?? 0);
+                    return nc.Compare(xName, yName);
                 }
                 catch
                 {
diff --git a/SabreTools.DatFiles/ItemDictionaryDB.cs b/SabreTools.DatFiles/ItemDictionaryDB.cs
index 780d4025..ab36a016 100644
--- a/SabreTools.DatFiles/ItemDictionaryDB.cs
+++ b/SabreTools.DatFiles/ItemDictionaryDB.cs
@@ -1153,12 +1153,13 @@ namespace SabreTools.DatFiles
         /// <returns>True if it sorted correctly, false otherwise</returns>
         private bool Sort(ref List<KeyValuePair<long, DatItem>> itemMappings, bool norename)
         {
+            // Create the comparer extenal to the delegate
+            var nc = new NaturalComparer();
+            
             itemMappings.Sort(delegate (KeyValuePair<long, DatItem> x, KeyValuePair<long, DatItem> y)
             {
                 try
                 {
-                    var nc = new NaturalComparer();
-
                     // Get the machines
                     Machine? xMachine = _machines[_itemToMachineMapping[x.Key]];
                     Machine? yMachine = _machines[_itemToMachineMapping[y.Key]];
diff --git a/SabreTools.DatTools/Diffing.cs b/SabreTools.DatTools/Diffing.cs
index e5003d40..bafdd8ca 100644
--- a/SabreTools.DatTools/Diffing.cs
+++ b/SabreTools.DatTools/Diffing.cs
@@ -256,7 +256,8 @@ namespace SabreTools.DatTools
             List<DatFile> outDats = [];
 
             // Ensure the current DatFile is sorted optimally
-            datFile.BucketBy(ItemKey.CRC);
+            datFile.BucketBy(ItemKey.CRC, norename: false);
+            datFile.Deduplicate();
 
             // Loop through each of the inputs and get or create a new DatData object
             InternalStopwatch watch = new("Initializing and filling all output DATs");
@@ -306,7 +307,7 @@ namespace SabreTools.DatTools
             foreach (var key in datFile.Items.SortedKeys)
 #endif
             {
-                List<DatItem> items = ItemDictionary.Merge(datFile.GetItemsForBucket(key));
+                List<DatItem> items = datFile.GetItemsForBucket(key);
 
                 // If the rom list is empty or null, just skip it
                 if (items == null || items.Count == 0)
diff --git a/SabreTools.DatTools/Splitter.cs b/SabreTools.DatTools/Splitter.cs
index 14df2328..1c99b7b8 100644
--- a/SabreTools.DatTools/Splitter.cs
+++ b/SabreTools.DatTools/Splitter.cs
@@ -552,7 +552,7 @@ namespace SabreTools.DatTools
         /// <returns>-1 for a coming before b, 0 for a == b, 1 for a coming after b</returns>
         private static int SplitByLevelSort(string a, string b)
         {
-            NaturalComparer nc = new();
+            var nc = new NaturalComparer();
             int adeep = a.Count(c => c == '/' || c == '\\');
             int bdeep = b.Count(c => c == '/' || c == '\\');