Let me know if that's what it was.
A good lesson is to bring everything up to a standard level of fitment.
- I bring all my radios up to a known good firmware level (or in this case with the XTLs - the last. In the XTLs I make sure that I match up the control head versions as well)
- I wire all my accessory port pigtails the same way (at least on the output end) I give myself access to the serial lines, ign sense, speaker and a single GPIO (to start).
- I place programming pigtails where appropriate on remote mounts. Remote mount can be in the trunk, but I want to be sitting in my comfy heated seat when I have to program it.
- I standardize my personal codeplug layouts.
- I program 99% of my physical buttons the same way.
My minimum standards level would have caught what you found in #2.
Glad you (probably) have it sorted!