I (Oakland) beat Cincy and they jump like that? Baltimore is only 4-0 team left in AFC North after both Cincy and Pittsburgh dropped games, but Baltimore drops and I drop, while losing Cincy rises?

Is this because I had an ungodly amount of sacks and penalties against me (as per usual)? :-)

The first season of a league can have some very strange ups and downs in the power rankings. As more seasons go by, it will be less strange. There will still be some strange ups and downs. Just not as many as the first season.