Both my Ranger and F350 crab walk down the road, I know what caused the Ranger issue, no idea on the F350 (346k on the clock, I've only put 25k of that on it...), that isn't anything to worry about. That's just the bumper bracket, hammer it back out so the bumper can be bolted on right and call it good, no need to weld up that seam on the top, it won't do much...