Timing problems

Does the crank sprocket on you engine have three keyways on it? If so each keyway will have two marks, one to mark the keyway and one to line up the dots with. One is to retard the cam, one for straight up, and one to advance the cam.The one next to a keyway should not be used to line up the dots. the other one should. This can sometimes be tricky and is a good reason to degree the cam.