What is recognised as an 'album'?

[solanum]

I have a few albums where Minimserver lists tracks to a client as being in multiple albums with the same name. Other software accessing the files see them as a single album, they were ripped using a single album name and I can't see any difference (e.g. extraneous spaces). They are all in the same directory and album artist doesn't vary either.

The tracks aren't replicated, so it isn't that they are in more than one place. The albums are being split, sometimes track by track.

Anyone with any clues as to why Minimserver thinks they are from different albums? Does it use anything other than album name?