Just to clarify my setup, which should probably now have its own topic, the RB5, 8.4 screen, and lower stack all came from 2011 Journeys.
The radio came from one Journey and the screen and lower stack came from the another Journey.
Aside from adjusting the temperature, everything works from the touch screen. All of the steering wheel controls work as well.
I'm betting that the cable that runs from the screen to the lower stack isn't seated properly at the screen side. I can't think of another reason why the same behavior would follow both units.
Dremel is a good idea that I'll use as a last resort. I need 1/16" to 1/8" of space and I can't seem to make that adjustment.