I'm not sure if Track# is supposed to be numeric only. The flip side of a disc would still be a second disc.

Really? Its not really a second disc. Its odd that MMW treats it correctly, but MMA doesn't, so the solution is to retag in a different way. Is this not considered a bug in MMA then?

You should use Disc# field to separate the Albums tracks among different discs and sorting will work.

I have tagged some classic albums with track numbers to mirror album sides (A1, A2,A3,A4,A5, B1, B2, B3, etc.)

MMW orders the tracks just fine, but MMA seems to ignore the letter and only look at the number. So, the order looks like this:

101 (A1)
101 (B1)
102 (A2)
102 (B2)

etc.

Is this a bug? I thought the order would match the order on the album when utilizing the letter to denote the album side and the number to denote the track on that specific side?