I don't like to complain about officiating, but we won and these are actually some legitimate questions.
So I saw it mentioned somewhere else that there was a rule change to prevent players outside of the tackle box from being cut down by a block below the waist.
The NCAA website says:
Offensive players in the tackle box at the snap who are not in motion are allowed to block below the waist legally without restriction. All other players are restricted from blocking below the waist with a few exceptions (for example, straight-ahead blocks).
So were these blocks on CB/Safeties legal because they straight on? Or were the refs just not calling it when they should have? I wouldn't put that past them based on the fact that they were seemingly following Arena Football rules about players in motion.