When an album is opened via “Manual Correct from Musicbrainz”, the track#s for the matching MB release are always displayed inaccurately, incremented by +1. Track 1 = 2, Track 2 = 3, etc etc…
The tracks are updated with accurate data if the change is applied, so the issue seems to affect only the display and not the downloaded data.
This happens %100 of the time on my system. OSX, Jaikoz 5.3.0.