To stop from torquing the bow your shooting platform has to be totally relaxed, loose/natural grip, natural stance, natural shoulder/arm position, if there is no undue tension in the system, you can't impart torque to the bow. Stand and practice shooting without your bow and take note of how you are most comfortable with the above elements then add the bow to the system and maintain that comfortable shooting position. The only tension you should have is a mildly increasing tension at your shoulder blades as you tense them up and push/pull through the shot. Randy Ulmer has some great video of proper shooting form that may be helpful.