Great shooting! I saw the creeping here and there too, mostly with the 75# bow. Since I couldn't even get a 75# bow to full draw, I'm sure I would creep too. With a static draw, you need to maintain back tension until after the shot is released, or you will creep. The tendency is to relax the back at the same time you relax the fingers, but those two actions need to be separate. Learn to be aware of your back when you release the shot and keep the back tension until after the shot is released.