New user, so I'm possibly doing something wrong. The trial worked fine with batch matching, but after purchasing a lic, batch matching to Musicbrainz fails.
Task 10:Started correct metadata from MusicBrainz on 55 songs
INFO: Unable to match song "XX" file (get same INFO for every file)
Task 10:Ignored 11 songs because they already have a MusicBrainz uniqueid
Task 10:Corrected 0 songs from MusicBrainz successfully
Task 10:Completed correcting metadata from MusicBrainz on 55 songs
I can manually match successfully.
Started correct metadata from MusicBrainz on 1 songs
INFO: Resizing /release/06a86c13-23ba-4d43-807a-29da9291a06b/front from 1,406 pixels to 800 pixels because larger than your preferred width of 800 pixels
INFO: Successfully matched 1 songs to the MusicBrainz Release XX (Album)
INFO: Corrected 1 songs from MusicBrainz successfully
INFO: Completed correcting metadata from MusicBrainz on 1 songs
Jaikoz always trys to group songs and then match to complete albums, and this option ensures that song groupings are not broken if say it could match but some not all the songs because perhaps some songs are in the database but not for the particular album the customer has.
But if your songs are not organized one folder per album, or if you are not that bothered about albums just songs disabling this option will usually get you more matches.