I only know NCAA rules, and the snapper is permitted to adjust the ball as he likes before the snap, as long as he doesn't lift the ball off the ground, make a movement that simulates the start of the snap, and the long axis of the ball is parallel to the sidelines when the snap begins. He may adjust the ball by rotating it around either of its axes, and elevate one end of the ball. What more adjustment is possible? None. So, why are we concerned with how we spot the ball? We aren't. We simply spot the ball, and let the snapper do his thing. Nobody complains or criticizes, and all is well.
Do other rule sets not allow the snapper to adjust the ball?