Got a new agenda 7 at Palmetto State Armory in Summerville, SC. Shoots great. However the first d loop I had popped off mid pull about a week after I got it. 2nd d loop the guy burned part of it, not the ends, and it was beginning to tear. Went back today and a different guy who seemed more competent tied it on it everything was fine. But then I shot it and from my 20 yard mark it was about 8 inches high. I had just shot it and it was dead on at 20. It's all fixed now but I had to bump my sight up tremendously. Does anyone know what may have caused that?