Your bow arm is not lined up with your shoulders. It is likely slightly closed in towards your chest. In trying to get to full draw, you are pushing AND pulling your bow arm to the rear slightly. Push at the target. Push AT the target. Pull straight back. If your feet are 90 degrees to the target face, so should your chest and bow arm. Problem is, the string catches your shirt, pockets, and sometimes your nipples! So you have to compromise a little and open up your stance. I came to realize one thing from all this: If, you are pointed at target and pull straight back, nothing should get between the string and the bow unless you DID NOT pull straight back.