diff --git a/DATabase/ImportExport/Generate.cs b/DATabase/ImportExport/Generate.cs
index 8253474a..cd8f8102 100644
--- a/DATabase/ImportExport/Generate.cs
+++ b/DATabase/ImportExport/Generate.cs
@@ -284,7 +284,7 @@ JOIN checksums
 			{
 				foreach (string key in roms.Keys)
 				{
-					roms[key] = RomManipulation.Merge(roms[key]);
+					roms[key] = RomManipulation.Merge(roms[key], _logger);
 				}
 			}
 			// END COMMENT
diff --git a/DATabase/ImportExport/Import.cs b/DATabase/ImportExport/Import.cs
index 04f7a23d..97f20d01 100644
--- a/DATabase/ImportExport/Import.cs
+++ b/DATabase/ImportExport/Import.cs
@@ -378,7 +378,7 @@ namespace SabreTools
 				List<RomData> newroms = roms;
 				if (datdata.MergeRoms)
 				{
-					newroms = RomManipulation.Merge(newroms);
+					newroms = RomManipulation.Merge(newroms, _logger);
 				}
 
 				foreach (RomData rom in newroms)
diff --git a/DATabase/MergeDiff.cs b/DATabase/MergeDiff.cs
index e07799c8..7ce31619 100644
--- a/DATabase/MergeDiff.cs
+++ b/DATabase/MergeDiff.cs
@@ -193,7 +193,7 @@ namespace SabreTools
 				foreach (string key in userData.Roms.Keys)
 				{
 					List<RomData> temp = userData.Roms[key];
-					temp = RomManipulation.Merge(temp);
+					temp = RomManipulation.Merge(temp, _logger);
 
 					foreach (RomData rom in temp)
 					{
@@ -281,7 +281,7 @@ namespace SabreTools
 				foreach (string key in userData.Roms.Keys)
 				{
 					List<RomData> temp = userData.Roms[key];
-					temp = RomManipulation.Merge(temp);
+					temp = RomManipulation.Merge(temp, _logger);
 
 					foreach (RomData rom in temp)
 					{
@@ -342,7 +342,7 @@ namespace SabreTools
 					List<string> keys = userData.Roms.Keys.ToList();
 					foreach (string key in keys)
 					{
-						List<RomData> oldroms = RomManipulation.Merge(userData.Roms[key]);
+						List<RomData> oldroms = RomManipulation.Merge(userData.Roms[key], _logger);
 						List<RomData> newroms = new List<RomData>();
 
 						foreach (RomData rom in oldroms)
diff --git a/OfflineMerge/OfflineMerge.cs b/OfflineMerge/OfflineMerge.cs
index 31fcfae7..bdec75fe 100644
--- a/OfflineMerge/OfflineMerge.cs
+++ b/OfflineMerge/OfflineMerge.cs
@@ -153,7 +153,7 @@ namespace SabreTools
 				Dictionary<string, List<RomData>> netNew = new Dictionary<string, List<RomData>>();
 				foreach (string key in completeDats.Roms.Keys)
 				{
-					List<RomData> templist = RomManipulation.Merge(completeDats.Roms[key]);
+					List<RomData> templist = RomManipulation.Merge(completeDats.Roms[key], _logger);
 					foreach (RomData rom in templist)
 					{
 						if (rom.Dupe == DupeType.None && rom.System == _currentNewMerged)
@@ -177,7 +177,7 @@ namespace SabreTools
 				Dictionary<string, List<RomData>> unneeded = new Dictionary<string, List<RomData>>();
 				foreach (string key in completeDats.Roms.Keys)
 				{
-					List<RomData> templist = RomManipulation.Merge(completeDats.Roms[key]);
+					List<RomData> templist = RomManipulation.Merge(completeDats.Roms[key], _logger);
 					foreach (RomData rom in templist)
 					{
 						if (rom.Dupe == DupeType.None && rom.System == _currentAllMerged)
@@ -214,7 +214,7 @@ namespace SabreTools
 				Dictionary<string, List<RomData>> newMissing = new Dictionary<string, List<RomData>>();
 				foreach (string key in midMissing.Roms.Keys)
 				{
-					List<RomData> templist = RomManipulation.Merge(midMissing.Roms[key]);
+					List<RomData> templist = RomManipulation.Merge(midMissing.Roms[key], _logger);
 					foreach (RomData rom in templist)
 					{
 						if (rom.Dupe == DupeType.None && rom.System == _currentMissingMerged)
@@ -286,7 +286,7 @@ namespace SabreTools
 				Dictionary<string, List<RomData>> have = new Dictionary<string, List<RomData>>();
 				foreach (string key in midHave.Keys)
 				{
-					List<RomData> templist = RomManipulation.Merge(midHave[key]);
+					List<RomData> templist = RomManipulation.Merge(midHave[key], _logger);
 					foreach (RomData rom in templist)
 					{
 						if (rom.Dupe == DupeType.None && rom.System == _currentNewMerged)
@@ -454,7 +454,7 @@ namespace SabreTools
 				Dictionary<string, List<RomData>> have = new Dictionary<string, List<RomData>>();
 				foreach (string key in midHave.Roms.Keys)
 				{
-					List<RomData> templist = RomManipulation.Merge(midHave.Roms[key]);
+					List<RomData> templist = RomManipulation.Merge(midHave.Roms[key], _logger);
 					foreach (RomData rom in templist)
 					{
 						if (rom.Dupe == DupeType.None && rom.System == _currentAllMerged)
@@ -524,7 +524,7 @@ namespace SabreTools
 				Dictionary<string, List<RomData>> have = new Dictionary<string, List<RomData>>();
 				foreach (string key in midHave.Roms.Keys)
 				{
-					List<RomData> templist = RomManipulation.Merge(midHave.Roms[key]);
+					List<RomData> templist = RomManipulation.Merge(midHave.Roms[key], _logger);
 					foreach (RomData rom in templist)
 					{
 						if (rom.Dupe == DupeType.None && rom.System == _currentNewMerged)
diff --git a/SabreHelper/RomManipulation.cs b/SabreHelper/RomManipulation.cs
index 3eb9dc73..87d1a475 100644
--- a/SabreHelper/RomManipulation.cs
+++ b/SabreHelper/RomManipulation.cs
@@ -59,7 +59,6 @@ namespace SabreTools.Helper
 			}
 
 			XmlTextReader xtr;
-			StringReader sr;
 			xtr = new XmlTextReader(filename);
 			xtr.WhitespaceHandling = WhitespaceHandling.None;
 			xtr.DtdProcessing = DtdProcessing.Ignore;
@@ -395,7 +394,6 @@ namespace SabreTools.Helper
 			StreamReader sr = new StreamReader(File.OpenRead(filename));
 
 			string blocktype = "";
-			string lastgame = null;
 			while (!sr.EndOfStream)
 			{
 				string line = sr.ReadLine();
@@ -1263,32 +1261,29 @@ namespace SabreTools.Helper
 		/// Merge an arbitrary set of ROMs based on the supplied information
 		/// </summary>
 		/// <param name="inroms">List of RomData objects representing the roms to be merged</param>
-		/// <param name="presorted">True if the list should be considered pre-sorted (default false)</param>
+		/// <param name="logger">Logger object for console and/or file output</param>
 		/// <returns>A List of RomData objects representing the merged roms</returns>
-		public static List<RomData> Merge(List<RomData> inroms, bool presorted = false)
+		public static List<RomData> Merge(List<RomData> inroms, Logger logger)
 		{
 			List<RomData> outroms = new List<RomData>();
 
-			// First sort the roms by size, crc, md5, sha1 (in order), if not sorted already
-			if (!presorted)
+			// First sort the roms by size, crc, md5, sha1 (in order)
+			inroms.Sort(delegate (RomData x, RomData y)
 			{
-				inroms.Sort(delegate (RomData x, RomData y)
+				if (x.Size == y.Size)
 				{
-					if (x.Size == y.Size)
+					if (x.CRC == y.CRC)
 					{
-						if (x.CRC == y.CRC)
+						if (x.MD5 == y.MD5)
 						{
-							if (x.MD5 == y.MD5)
-							{
-								return String.Compare(x.SHA1, y.SHA1);
-							}
-							return String.Compare(x.MD5, y.MD5);
+							return String.Compare(x.SHA1, y.SHA1);
 						}
-						return String.Compare(x.CRC, y.CRC);
+						return String.Compare(x.MD5, y.MD5);
 					}
-					return (int)(x.Size - y.Size);
-				});
-			}
+					return String.Compare(x.CRC, y.CRC);
+				}
+				return (int)(x.Size - y.Size);
+			});
 
 			// Then, deduplicate them by checking to see if data matches
 			foreach (RomData rom in inroms)
@@ -1335,6 +1330,8 @@ namespace SabreTools.Helper
 						// If it's a duplicate, skip adding it to the output but add any missing information
 						if (dupefound)
 						{
+							logger.Log("Rom information of found duplicate: " + rom.Game + "\t" + rom.Name + "\t" + rom.Size + "\t" + rom.CRC + "\t" + rom.MD5 + "\t" + rom.SHA1);
+
 							savedrom = lastrom;
 							pos = i;
 
@@ -1456,7 +1453,7 @@ namespace SabreTools.Helper
 				List<RomData> newroms = roms;
 				if (mergeroms)
 				{
-					newroms = RomManipulation.Merge(newroms);
+					newroms = RomManipulation.Merge(newroms, logger);
 				}
 
 				foreach (RomData rom in newroms)