You might check the tiller measurements, sounds like the lower limb might be flexing more, but I am not sure why. If the upper limb measurement was say 3/16" greater than the lower, but is now only 1/16", something caused the change to make the lower limb stiffer in relation to the upper. At zero or negative the arrows won't fly regardless of what you do with the nocking point, until you bring it back into a positive tiller. At least that has been my experience.