Buk, Accuracy in archery is all about consistancy. You must do the same thing each and every time you shoot. The arrow, stance, grip, draw, aim and release must be consistant to insure top accuracy. If any of these points is different it will effect your arrows point of impact to some extent. Once you develop this kind of routine you will see your accuracy improve. I have no idea what you are doing but I would guess that you are putting some type of pressure on your grip or you may be looking for your arrow at the release or jerking your release pulling it away from the face causing the arrow to hit to the side. If you're right handed and pulling away from your face your arrows will normally hit left of your aiming point. Since the first one was in there that's what I would look at first. All three are very common and can be frustrating. Those are the 3 most common reasons assuming good arrow clearance & flight from your bow. Good luck and I hope you get it worked out.