Many use a loop, it is the best setup for most. I shoot off the string , as you do , my setup is a rubber cusion below , the nock , a brass nockpoint above, and above that I tye in a serving nock .

Your setup is definatly causeing problems , I cant believe someone set up a bow that way . Something else you need to consider , and do is get new nocks for your arrows as , yours will be toast after the abuse they have been thru .
Hince the signature line

A properly tyed in nock needs no brass nockpoint , if your want a nockpoint with a loop for referance Id sugest a tyed in serving type