well i have only bow hunted one year and had my bow for three.
It could be the weight i am drawing 68 pounds but have never really had trouble getting it back. maybe alittle when i first got the bow.
ORIGINAL: StraightArrowNY
Maybe you're drawing too fast at the end of your draw cycle. I could see how this could "catapult" your arrow off the rest.
I see you're a life member so you know what your doing, so I don't want to insult you, but is it possible that you're pulling too much weight? Sometimes being overbowed can make for an unsteady draw cycle.
I don't use dropaways, but I've seen many of them that have a hard surface that the arrow rests on. Maybe a little piece of molehair would soften it up. The arrow would be a little less responsive to a soft surface than the hard surface.