Nothing was cleared or touched before the stock runs (at least to my knowledge, i doubt the dyno shop has the tools to do that).
Clearing the adaptations is not going to make the car run rich like that.
Maybe a glitch with the wideband. The shop did tell me that on one of the runs with my tune it matched the stock AFR. Stock targets are around 12.5 at redline. I target around 12.8.