Shorter bolts if cross-threaded and fully seated, the head can indeed appear to be tilted with respect to the surface it fits against. That’s one way to tell they are cross threaded. The longer the bolt and hole, the less that effect will be. Say you have two old fashioned 5 foot diameter hand dug water wells, one is 10 feet deep and the other is 50 feet deep. If you put a long wood pole in the 10 foot well until it bottoms out and let it fall against the side, it will tilt at a larger angle w/respect to vertical than the same pole in the 50 foot well.