Yep, @chaircrusher has it exactly right, per the spec–see page 34, which is the CC setup. You get messages with first byte B0…B5 [there’s a typo in the manual, it has B4 twice] for CCs 16 to 23, which are channels 1 through 6, and then with track bank on you get the same CCs starting with B6 through BB (channels 7 through 12). Doesn’t seem configurable. It’s basically designed to work only with Ableton.
Various ways to handle this, inside and outside of Rack–if you know a little bit of Python (or want to learn) you could easily write a custom adapter using python-rtmidi–check out the MIDI filter example for a good starting point.