ITA and several posters have made the same observation.
Mirai should have a much bigger lead and IMO if anyone was held up by the judges last night it was Rachael and Ashley.
I think Rachel deserved a big score for that performance. Granted, I wasn't expecting 69 (she was the first contender to skate)- I thought, maybe 64/65. So, by giving Rachel 69, the judges backed themselves into a corner to give Cohen and Nagasu more than that
As for Wagner, she's DEFINITELY gotten a score boost just to keep her in contention. But in all honesty, based on the way they scored the other three I DON'T think it's outrageous. The score difference is about the same. They all attacked the SP, Wagner fell and lost points, but otherwise was pretty good. Czisny and Zhang, OTOH, let their mistakes derail the performance. That's why Wagner still has a shot and they don't. Simple.