Alright... i figured out one common thread. All of the ones that aren't importing are files i got from e-music before i canceled. They've all since been added to or retagged with MP3 Tag Studio. I've yet to find one album from e-music that imported the year and comments correctly. VERY strange. MP3TS reports them all as okay.

EDIT: Okay, just did a test. Apparently this is an emplode only problem. I imported two tracks that previously didn't work, once in emplode, then in another playlist in jEmplode. Worked fine in jEmplode, emplode didn't.

So, it looks like the files that didn't work, all have VBR Header problems i never noticed. In MP3 Tag Studio, if i select an mp3 with the problem, the Length and Frames numbers are in Red. Once i fix the header, no red. Either way, fixed or not, emplode still won't read the year and comment.

Welp, this sucks. Looks like i'm going to just start over again using only jEmplode. Fun.