[quote=miasma]For example I have a great album called “Shotgun Blossom” by Snapper which was correctly typed in for each track. 2 tracks were changed either in title or artist to band Red Snapper, a rapper called Snapper caused another track to turn into album “Con-nect” with genre changes for each.
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There is a bug in musicbrainz which causes it to have problems matching the title for common connectives words like ‘and’, ‘the’ … if the case of the word doesnt match the case ibn Musicbrainz. This has been fixed but not released yet http://bugs.musicbrainz.org/ticket/3741
Looking at the tracklist for the release at http://musicbrainz.org/release/ebab3ba3-547f-449f-8bb2-207f4e7e1152.html I wonder if your problem tracks were any of the following:What Are You Thinking,\tSnapper and the Ocean,Eyes That Shine,Pop Your Top because all these tracks contain words that need to matched case sensitevely. If you have the case is different these tracks wont match and then it seems tracks from another artist that match enough other tracks are getting a better score. Normally these tracks wouldnt get a good enough score to get a match, but it appears in your case this has happened.
I did put in a workaround for this problem, but it doesnt solve all instances of this, and its too complicated for me to explain exactly when it could happen, but I’ll see if I can improve the workaround further.
You could increase ‘Preferences/Musicbrainz /AutoMatch/Minimum Rating required if Metamatch only’ to make it harder for false matches.
[quote=miasma]
Another irritation is that songs from particular albums are changed to different albums by the same artists eg. Greatest Hits. I know they appear on more than one album but shouldn’t they be left as the original one?[/quote]
It depends if the album they are currently on is found in Musicbrainz, normally they would be because this would get the best score. But if only the wrong album is on Musicbrainz and you want the best match from Musicbrainz then it will be changed.