I had finally pulled that 2nd butt last night, and and let it rest in the oven. Didn't feel like pulling it right away, so I turned the oven on to holding temp and took a nap. When I got up, I pulled it out and it was even more tender than Butt A. So, I think that I have learned to A) not to panic, and B) to let it rest even longer than I usually do.
It is all really good. Put what was left of the first one into a freezer bag for another feast or to gift.
I took some qview pics and will post them later.