diff --git a/src/backend/metadata.cpp b/src/backend/metadata.cpp
index 947f30bc..67985bbb 100644
--- a/src/backend/metadata.cpp
+++ b/src/backend/metadata.cpp
@@ -472,12 +472,7 @@ namespace loot {
         BOOST_LOG_TRIVIAL(trace) << "Calculating metadata difference for: " << name;
         Plugin p(*this);
 
-        p.Enabled(plugin.Enabled());
-        if (priority != plugin.Priority()) {
-            p.Priority(plugin.Priority());
-            p.SetPriorityExplicit(plugin.IsPriorityExplicit());
-        }
-        else {
+        if (priority == plugin.Priority()) {
             p.Priority(0);
             p.SetPriorityExplicit(false);
         }
@@ -485,17 +480,17 @@ namespace loot {
         //Compare this plugin against the given plugin.
         set<File> files = plugin.LoadAfter();
         set<File> filesDiff;
-        set_symmetric_difference(files.begin(), files.end(), loadAfter.begin(), loadAfter.end(), inserter(filesDiff, filesDiff.begin()));
+        set_symmetric_difference(loadAfter.begin(), loadAfter.end(), files.begin(), files.end(), inserter(filesDiff, filesDiff.begin()));
         p.LoadAfter(filesDiff);
 
         filesDiff.clear();
         files = plugin.Reqs();
-        set_symmetric_difference(files.begin(), files.end(), requirements.begin(), requirements.end(), inserter(filesDiff, filesDiff.begin()));
+        set_symmetric_difference(requirements.begin(), requirements.end(), files.begin(), files.end(), inserter(filesDiff, filesDiff.begin()));
         p.Reqs(filesDiff);
 
         filesDiff.clear();
         files = plugin.Incs();
-        set_symmetric_difference(files.begin(), files.end(), incompatibilities.begin(), incompatibilities.end(), inserter(filesDiff, filesDiff.begin()));
+        set_symmetric_difference(incompatibilities.begin(), incompatibilities.end(), files.begin(), files.end(), inserter(filesDiff, filesDiff.begin()));
         p.Incs(filesDiff);
 
         list<Message> msgs1 = plugin.Messages();
@@ -503,17 +498,58 @@ namespace loot {
         msgs1.sort();
         msgs2.sort();
         list<Message> mDiff;
-        set_symmetric_difference(msgs1.begin(), msgs1.end(), msgs2.begin(), msgs2.end(), inserter(mDiff, mDiff.begin()));
+        set_symmetric_difference(msgs2.begin(), msgs2.end(), msgs1.begin(), msgs1.end(), inserter(mDiff, mDiff.begin()));
         p.Messages(mDiff);
 
         set<Tag> bashTags = plugin.Tags();
         set<Tag> tagDiff;
-        set_symmetric_difference(bashTags.begin(), bashTags.end(), tags.begin(), tags.end(), inserter(tagDiff, tagDiff.begin()));
+        set_symmetric_difference(tags.begin(), tags.end(), bashTags.begin(), bashTags.end(), inserter(tagDiff, tagDiff.begin()));
         p.Tags(tagDiff);
 
         set<PluginDirtyInfo> dirtyInfo = plugin.DirtyInfo();
         set<PluginDirtyInfo> dirtDiff;
-        set_symmetric_difference(dirtyInfo.begin(), dirtyInfo.end(), _dirtyInfo.begin(), _dirtyInfo.end(), inserter(dirtDiff, dirtDiff.begin()));
+        set_symmetric_difference(_dirtyInfo.begin(), _dirtyInfo.end(), dirtyInfo.begin(), dirtyInfo.end(), inserter(dirtDiff, dirtDiff.begin()));
+        p.DirtyInfo(dirtDiff);
+
+        return p;
+    }
+
+    Plugin Plugin::NewMetadata(const Plugin& plugin) const {
+        BOOST_LOG_TRIVIAL(trace) << "Comparing new metadata for: " << name;
+        Plugin p(*this);
+
+        //Compare this plugin against the given plugin.
+        set<File> files = plugin.LoadAfter();
+        set<File> filesDiff;
+        set_difference(loadAfter.begin(), loadAfter.end(), files.begin(), files.end(), inserter(filesDiff, filesDiff.begin()));
+        p.LoadAfter(filesDiff);
+
+        filesDiff.clear();
+        files = plugin.Reqs();
+        set_difference(requirements.begin(), requirements.end(), files.begin(), files.end(), inserter(filesDiff, filesDiff.begin()));
+        p.Reqs(filesDiff);
+
+        filesDiff.clear();
+        files = plugin.Incs();
+        set_difference(incompatibilities.begin(), incompatibilities.end(), files.begin(), files.end(), inserter(filesDiff, filesDiff.begin()));
+        p.Incs(filesDiff);
+
+        list<Message> msgs1 = plugin.Messages();
+        list<Message> msgs2 = messages;
+        msgs1.sort();
+        msgs2.sort();
+        list<Message> mDiff;
+        set_difference(msgs2.begin(), msgs2.end(), msgs1.begin(), msgs1.end(), inserter(mDiff, mDiff.begin()));
+        p.Messages(mDiff);
+
+        set<Tag> bashTags = plugin.Tags();
+        set<Tag> tagDiff;
+        set_difference(tags.begin(), tags.end(), bashTags.begin(), bashTags.end(), inserter(tagDiff, tagDiff.begin()));
+        p.Tags(tagDiff);
+
+        set<PluginDirtyInfo> dirtyInfo = plugin.DirtyInfo();
+        set<PluginDirtyInfo> dirtDiff;
+        set_difference(_dirtyInfo.begin(), _dirtyInfo.end(), dirtyInfo.begin(), dirtyInfo.end(), inserter(dirtDiff, dirtDiff.begin()));
         p.DirtyInfo(dirtDiff);
 
         return p;
diff --git a/src/backend/metadata.h b/src/backend/metadata.h
index 95de1d7f..00af7075 100644
--- a/src/backend/metadata.h
+++ b/src/backend/metadata.h
@@ -172,10 +172,15 @@ namespace loot {
         void MergeMetadata(const Plugin& plugin);
 
         //Returns the difference in metadata between the two plugins.
-        //For 'enabled', use the given plugin's value.
-        //For 'priority', use the given plugin's value, unless it is equal to this plugin's value, in which case return 0.
+        //For 'enabled', use this plugin's value.
+        //For 'priority', use 0 if the two plugin priorities are equal, and make it not explicit. Otherwise use this plugin's value.
         Plugin DiffMetadata(const Plugin& plugin) const;
 
+        // Returns metadata in this plugin not in the given plugin.
+        //For 'enabled', use this plugin's value.
+        //For 'priority', use 0 if the two plugin priorities are equal, and make it not explicit. Otherwise use this plugin's value.
+        Plugin NewMetadata(const Plugin& plugin) const;
+
         std::string Name() const;
         bool Enabled() const;
         int Priority() const;
diff --git a/src/gui/handler.cpp b/src/gui/handler.cpp
index de229831..72237cfc 100644
--- a/src/gui/handler.cpp
+++ b/src/gui/handler.cpp
@@ -485,6 +485,16 @@ namespace loot {
         if (pluginMetadata["userlist"]["dirty"])
             newUserlistEntry.DirtyInfo(pluginMetadata["userlist"]["dirty"].as<set<PluginDirtyInfo>>());
 
+        // For cleanliness, only data that does not duplicate masterlist and plugin data should be retained, so diff that.
+        auto pluginIt = g_app_state.CurrentGame().plugins.find(boost::locale::to_lower(newUserlistEntry.Name()));
+        if (pluginIt != g_app_state.CurrentGame().plugins.end()) {
+            Plugin tempPlugin(pluginIt->second);
+            tempPlugin.MergeMetadata(g_app_state.CurrentGame().masterlist.FindPlugin(newUserlistEntry));
+            newUserlistEntry = newUserlistEntry.NewMetadata(tempPlugin);
+        }
+        else
+            newUserlistEntry = newUserlistEntry.NewMetadata(g_app_state.CurrentGame().masterlist.FindPlugin(newUserlistEntry));
+
         // Now replace existing userlist entry with the new one.
         if (!ulistPlugin.HasNameOnly()) {
             BOOST_LOG_TRIVIAL(trace) << "Replacing existing userlist entry with new metadata.";