this evening I rechecked my bow and found that the limbs have moved around the limb bolt head. I could tell from an area that I touched up with camo spray paint, and you can see that it has moved about an 1/8". I have tightened that allenhead limb bolt very little, and then shot the bow and cut the distance to 4" left of center, but am I supposed to tighten these bolts or better yet when should they be tightened and why are they moving??