rear bumper pulling away from frame

So my bike rack setup is no good? like I said, unless you make the bike rack as one with the trailer it will fail! my setup makes the bike rack a solid part of the trailer with no bounce. I have a rear view camera and I can watch the bikes as well as the road while I travel. I can tell you they do not bounce, even on bumpy roads. If people knew what kind of forces were exerted 2 feet behind the bumper of a long TT especially when the axles are 10-12 feet forward of the bumper they would not put bikes back there without some sort of support system!