Well if your arrows are grouping in one spot and your holding solid on the center, than its either your level isnt centered or your rest isnt adjusted right. Hold your bow with the boddot cam on your lap (sitting down and an arrow nocked) and line the string up with the groove on your cam that holds the main string on both the top and bottom cams. Then look up the string and down the arrow, if you can see that the arrow is turned to either side of the string, adjust the rest so that your arrow "disappears" behind the string. Then when you get it adjusted to where the arrow disappears, then you might have to adjust your site to it.This should cure your problem.