Here is a question, will reducing the draw weight help with the issue? As Mobow has said it sounds like a narrow valley issue. Even with less draw weight that valley isn't going to get any more forgiving. Sometimes with less draw weight there is more of a tendency to creep because you don't have to hold as "hard." I guess what I am wondering is whether it is a matter of fatigue causing the creeping or if it is just the short valley inheirent with such a fast bow?