I am using Emby for Kodi 1.1.53, and in my music library, when I sort music albums after "Tracks", multidisc albums don't get split up into their individual albums. The titles are ordered like
01 - foo
01 - foobar
02 - foofoo
02 - foofoobar
This same thing worked without problems when scanning the same audiofiles directly to kodi. Music is properly tagged, either MP3 or FLAC, with the disc tag set.