Dan I had all kinds of problems while I was shooting the GT two years ago doing simular things you are describing, Am I saying they are bad no but when I switched over to CX 350's I have never had another issue. I am shooting the 101st set at 65# at 28 1/2 and am getting 300fps on the dot and I can watch my CX 350's spiral with blazer vanes and broadheads. I have shot a two blade head and a 3 and 4 blade muzzy a 100 grain thunderhead and my grimrippers and all hit the same as a feildpoint. Like stated above I think you have an arrow issue. Is there a shop where you can go down there and shoot a bunch of different arrows?? Walt