It may be that a new version didn't fix the old dups. I know the newer version is now treat CUE properly , but I did a major manual clean up so I am not sure if the final fix sorted out old duplicates . I believe Hendrick is the "man" on this.
I have just looked at a newly imported FLAC & CUE album ( 2 files) and they show no ; 2 Suffix on the [Name] Tag. This is the new standard I think. The ;2 etc was the one before the fix.
Are your files
a Big FLAC and CUE file
OR
Individual FLAC Track files
Often individual tracks also have a series of other text files , eg Accurip, CUE, M3U , odd txt files etc as well as the track files. CUE Tools leaves these in the folder
Try this experiment
BACK UP YOUR LIBRARY FIRST
Find a duplicate album
Go To the folder where the files are Right Click Locate>On Disc External
if there is a ACCURIP , CUE TXT file along side a series of Track files , cut & paste them to somewhere that will not be autoimported
You should now have only Track files and a Folder jpg file
Run Auto Import manually Tools> Import> Run autoimport now
Does that fix it, the ;1 , ;2 tracks should disappear.
If not RESTORE YOUR BACKUP
If that works try 6233638's smartlist cure
What I did eventually was go through lots of folders on the HDD deleting CUE (and stray files) files in folders with track files , then in MC to sort by date imported , find which date related to the "[name]";1 format and deleted that import date for each album . Delete from Media Library ONLY option. To say the least I was not best pleased but it did work ,my library is now clean again.
My belief is that there should be NO [Name];x format name tags left if all is well.
I still have Filename = "F:\Music\Albums\Al Stewart\24 Carrots\Al Stewart - 24 Carrots (2007).flac;1" but these are virtual as this is a Big FLAC file pseudo files created by MC's split process, the [name] is normal text
I hope that makes sense
Mike