a light grip is good for self bow
32 inch draw could go 66 inches,, and some would say 64 but,,
if you weighed the bow and looked at the mass chart in volume 4 your would see it is probably to heavy for the draw and weight you are shooting,, that extra mass is probably part of the problem,,, but bending that much in the middle is part of it too,, not your grip,,, a combo of tiller and design,,