As far as we know Joe won the wrestle off, and no one should be surprised as Joe was technically a better wrestler and had seen Chandler's pin moves since high school and wasn't going to get caught in any. I just think they did the wrestle off wrong, given the circumstances that it was prep for a tournament and Joe had stamina & weight issues. I'd bet it was just a straight up wrestle off.
My thought at the time was here's how I would've done it. They had several good backup 165 & 174s. Two day wrestle off. Day 1 weigh in scratch, 1.5 hr later both wrestle simultaneously against 2 backups (4 backups total) rotate a fresh guy in every ~2 minutes, if there's a pin rotate a fresh guy in. 1 hour later Joe & Chandler wrestle. Day 2 scratch or +1lb, 1.5 hr later wrestle same time other 2 backups. 1 hr later Joe & Chandler. If one has won twice its over if not then 1 hour later Joe & Chandler wrestle a third time. If the 2 out of 3 is close and the winner had close matches against the backups but the loser of 2 out of 3 had multiple pins against backups (yes Wkn multiple pins, given you rotate a new guy after every pin Chandler could get 14 pins in a match, no pinfall needed but I regress), then you'd better think about it because you are looking for the best tournament point scoring wrestler.
But John didn't ask me so I bet they did a simple wrestle off. Downside of my plan is this had to be done week before Big 12s, do you really want you wrestler making weight twice and going thru 5 tough matches right before conference tourney? There were no easy/simple solutions. Well ok one, John could've kept his wife from feeding Joe cookies and ice-cream, and any who think that's easy maybe you aren't married.