Did you clean the bottom side of the overlap real good with suplied pad? If not then thats why. Also heated with hair dryer step 5 and pushed on firm while warm. Mine are firm in place and perfect. I really love the rubber texture.
I thoroughly wiped down the grip but didn't think to wipe down the bottom portion of the talon that would overlap on the backstrap. Looking at the instructions again it plainly says to do just that. I realize now that I overlapped the wrong way (supposed to be the right side on the bottom), so I'll have to do the backstrap again.