sorry i missed your reply. There is no easy way to do that. Might try Webtools that one of our employees made on his own before he was an employee ( he still updates it regularly). It can output a cvs file that can be opened in a spread sheet that might be easier to sift through.
as far as why it might do that one reason is if one version was added a while ago with when a different agent was used for library then after changing agent a copy was added which used the new agent. the agents give different GUIDs to the movies so they would not be seen as the same item. When you merge items it makes them both the same GUID. If you might have done that and the library is currently using the Plex Movie agent then refreshing metadata at the library level should update everything to use new agent and merge things that end up with same GUID. ( if they were in fact matched as the same movie)
