Those were prob small butts if you trimmed off some of the wally world fat (cap and extra; ect).
That's my hunch.
That being a guess, small butts are notorious for having an attitude.
If available, try two 10 lbs in bones from a butcher shop where they are not injected.
Reading the post I feel the pain in timing these cooks. Blame the meat not the cook! Keep ice and drinks handy.
John, he said this was a 2-pack from Sam's. Their butts are trimmed well, and are not injected (huge difference from the Tyson butts at Wallyworld).
Now, I'm going to take the fall on this one...
I was the one that recommended Dave rotate the butts halfway through, due to the lower butt being so close to the smoke box in the #2. Monday morning quarterbacking, I see that might have needed more clarification. 158 is really low for the stall, so the unit should have recovered box temp pretty quick. I have never had a stall lower than the 160s -170s! I agree, that if it looks like they are in the stall, that should not be interrupted! Magic time, happening right before your eyes!
Just seems too low, though! I was trying to avoid his lower butt from getting really dry on the bottom. I think, had Dave jammed them together, on one shelf, it would have smoked like a single 17 lb butt (up to 34 hours).
For the time, I believe that 2 butts, that size, is pretty tight in the #2. What I missed was that while not jammed together on one shelf, they were probably jammed together on 2 (vertically, rather than horizontally)! If there is good airspace between 2 large cuts, they will smoke as a single (time-wise). But, if really close together, they will smoke for the combined weight. So, 25 hours is not unreasonable, as it averaged 1.5 hrs/pound with combined weight. Bet that was it.
Didn't mean to steer you wrong, Dave! I just didn't consider them being so close together, vertically.