Amount Only PO Match Exception not following Rules

We have our match exception rules that work for regular POs. However, for Amount Only POs, the rules are ignored. We have our tolerances set. The amount only invoice for the year on a $250k PO was off by $0.05 (yes, 5 cents on a $250k PO), well within the tolerances. This is typical with all of our Amount Only POs not following the defined Rules and tolerance levels. On the one example, we have spent more time than $0.05 just to resolve it.

My question is why are the Rules not being followed for Amount Only POs? I verified the Document Association is set for Amount Only. I have verified the tolerance levels are set for the category.