By default when you are trying to match songs from the same folder Jaikoz assumes they are from the same album and only allows a match if can find an album that all songs match to. This is to prevent Jaikoz breaking up albums just because it can find matches for some of the songs.
There are exceptions if you are matching more than a 100 songs from one folder if Jaikoz cannot find a match assumes its a random folder.
Alternatively you can relax this behaviour by unchecking
Preferences:Remote Correct:Match:Only allow match if all songs in grouping match to one album