I'm confused. I understand last year's was because they were inelligible but what of the previous two years? The first of the three they beat OSU head to head and the only team that could/should object is MSU but the following year they won the Leaders outright and beat MSU in the BCG and last year OSUs cheating allowed them in. Based on that, OSUs cheating only impacted one Badger team.
If you take the retroactively ineligible Ohio State team out of there, it's a two team tie between Wisconsin and Michigan State, which Michigan State wins because of their head to head victory. Michigan State is at the top of that two team tie, but ended up at the bottom of the three way tie that occurred because of the ineligible Buckeyes.