You need to get on AT and ask a few guys there. Sonny Thomas might be able to help with this. As I understand it what you can so is untwist the cables/twist the string to advance the cams. You'll have to reset the module and drop stop, but advancing the cams supposedly reduces the hump you're talking about. This also reduces the amount of letoff. Maybe if you search AT you'll find the answers you need. I know it's been discussed there.
I don't mean anything personal here, but so many people end up with this problem and for the most part my answer is always that if you are popping into the valley so hard as to bounce the arrow off the rest then you're drawing more weight than you can control. I'm not picking on you, just explaining what the problem so often is. That's one reason I only shoot my 3D bows at 47# and back them off to 42# for indoor target. I want to be able to stop and hold the draw anywheere during the draw cycle and this is what it takes. I don't have it in my head that I must shoot a certain draw weight. I set the bows for what I like and whatever draw weight the bow is is where I shoot it.
If You're Not Living on the Edge You're Taking Up Too Much Space
Martin/Rytera Staff Shooter
PSAA Life member, UBP Life member
PADI AOW Diver