its either that or the nock of the arrow is to the right of the eye, condsidering you think you are pointing straight ahead but really you are pointing a little to the left due to the nock being right of you eye.

That or you could be really pinching the nock. Have someone video you....everyone thinks I am nutz but I have the video to prove it....when ever the arrow was bent, the arrow hit left..heck I split arrows left but damn if I could get them in the bull till I figured it out! I would check it all out to include arrow spine but I wouldnt jump to spine just yet when it probably has more to do with shooter error!