It is possible in unRAID to end up with files with the same name on more than one array disk.  In particular this could happen when moving files around the system between disk shares (typically at the command line level) if you make a copy and forget to delete the source.   This can be an issue on an unRAID system as if you are using unRAID user shares (as I expect most unRAID users would be) as unRAID only shows the first occurrence in such a case so it may not be obvious that you hav