First things first,is there a level on the sight? You could have the pins lined up vertically with the target but the target would have to be perfectly also.


If there is a level and you are sure it is level when shooting then all the above advise is good.If there is not a level,then you might be canting the bow.


You could also set the left and right at the farthest distance you can shoot accurately and move back up to the close yardage,you might still be on.Minor adjustments make a big difference at greater distances.