Just as a follow up. I thought I had my Mackie devices and ports deciphered but I was way off. This is how Windows 7 assigned both DM3200 USB MIDI ports and how I had to assign them in Cubase. It's pretty wacky because it is backwards.
Mackie 1 - faders 25-32 midi port 12 - DM3200 Slave
Mackie 2 - faders 17-24 midi port 11 - Dm3200 Slave
Mackie 3 - faders 9-16 midi port 6 - Dm3200 Master
Mackie 4 - faders 1-8 midi port 5 - Dm3200 Master
Now my first 32 DAW channels spread across both consoles in the remote layer and a nudge to the right selects track 33 as expected.