Mine rolls back about 15-20 degrees when the lift arms are all the way down. As the lift arms are raised, the rollback angle increases. I've never paid a lot of attention to the angle, just to the fact that the roll cylinders are retracted fully. Do you think you have the wrong plate and it is not made properly? When I hook up a QA implement, I lift and roll back the adapter before locking in the pins. It doesn't take much rollback at ground level to do that. Mine rolls back enough to hold a fully heaped bucket of dirt just below the hood level without losing much when I go over bumps, but certainly with the bucket low, the face of the bucket is nowhere near horizontal and the rear of the bucket with the adapter is sitting tilted toward the tractor at about a 30 Degree angle with the bucket 3' off the ground.
