I would also ask why you want an 80# bow. Drop that to 70#'s and with your draw length, you will still be smokin arrows. The lighter draw will also help "control" the bow better. There will be less strain, allowing you to think about form and execution more. Other than that, I can not add to what has already been stated. Maybe get a coach if you continue to see those creeping shots days.
JMAC