Thanks for cross posting me, much appreciated. The tracks listed on the Carbon in RMM did not show up as all Trance. A few genres were odd (more on this below), but most of them were correct.

After looking at the genre tags on the Carbon via RMM, I deleted ALL the music from the Carbon and then cleaned up any goofy Genres listed in RMM for the files on my PC (there were some that were listed as numbers between 1 and 99 due to unsynced v1 & v2 tags, a few of which were songs that had landed on the Carbon). I then put about 4GB worth back onto the Carbon.

The genre is still stuck at Trance for all songs on the Carbon. I would have thought that the database rebuild would clear things out, but sadly no.

I'm willing to give any suggestion a try as I've run out of ideas at this point.

-Zeke