Dude, you are a lifesaver. I was searching for answers via google, but none of the links I found for the forum explicitly stated how to solve the problem.
For posterity:
- enter Test Mode
- hold Function + Scene B while moving the crossfader across the entire range. The trigs should be green on trig 1 and trig 16 once you reach the full range on either side.
- reboot normally.
Nothing I came across spelled out step #2 explicitly. I was moving the fader and holding Scene B, but nothing I saw said you needed to hold function while doing it. Looks like everything is perfect now. Thank you. I am so happy I could kiss you. 