It' s entirely possible to get good paper tears and have a totally crappy tune on the bow. It' s happened to me. I was shooting great holes at 5 yards, 7 yards and 10 yards but my centershot was way off. A shop set up a bow for me shooting great holes, but my nockset was nearly an inch below square.

Paper tuning is NOT the last word. It' s a tool, and an unreliable tool at that.