Model 12 Ch 1/2 USB out duplicated

[mrjoshida]

I'm using my Model 12 with Ableton on a Macbook, and running into an issue I just can't figure out. When I send tracks out to the M12 from Ableton, everying works fine except for channels 1 and 2. I've got the M12 set to the default USB routing, and have panned channels 1/2 hard L/R. Any audio I send to either 1 or 2 ends up on both channels, regardless of their panning in Ableton or which channel I send it to. I've tried sending stereo tracks to both 1/2, individual tracks separately to 1 and 2, all manners of panning. No matter what, I always end up with 1 and 2 as duplicate mono tracks. Any idea what might be going on?