Those dual records/rankings are based on the specified starters/lineups on the date that the rankings process ran. If the results for individual matches are different than what is stated in the dual rankings breakdown page, (ie dual rankings breakdown says PSU beats Iowa 38 - 0, but when you pull up the dual comparison page, it may show 32 - 3), then that is because there are starters for either teams has changed.
Rankings don't get updated nearly as often during the offseason, but maybe I'll re-run them on a monthly basis as we start to get a better idea of who the starters may be for each team.
Keep in mind, other fans may be changing starters for fun, and also my data guy, Obrats (Rutgers fan), literally goes through team-by-team on a CONSISTENT basis updating information as he researches teams. He's knows A LOT about east coast teams, and really most D1 teams in general, so he updates as he goes.
Edit: by the way, I pulled up the dual rankings breakdown page for Penn State to show the 76 - 0 predictions here:
https://www.wrestlestat.com/rankings/dual/60/penn-state
Also, here's the individual comparison for Penn State vs Ohio State to show the discrepancy:
https://www.wrestlestat.com/compare/dual/60/penn-state/55/ohio-state
So, if the rankings were re-run right now, Penn State would show up with at least 1 loss, with the way the starters are currently set.