RE: extreme vft ??????
more info would be helpful
like draw weight
what arrow rest are you using?
a shoot thru rest or a full containment rest is hard to get tuned you will need to set a shoot thru prong style rest spring tension just right or you will get vertical tears thru paper.
if you are pulling 70 pounds the 5575 GT will have too weak of a spine the easiest way to see if it is the spine is to back the poundage off and see if it will shoot a bullet hole.
if it will shoot a bullet hole on 60# and not 70# you have a spine issue
you could try a 75 grain point and see if that helps any but I would recommend going to a stiffer arrow.
or it could be something as simple as the nocking point needs to be re located