I'd also be intereterested in seeing how many losses to p5 teams with adjusted records.

Utah plays many more p5 teams than BYU. And Utah inherently plays an even "mix" of P5 teams - a whole conferences worth every year. It is possible that BYU has played fewer teams in the "middle" where you might expect a win and for the p5 team to have an adjusted winning record.

I don't know what the case is, but the data would help.