Peyton Manning complained, the NFL listened and now the league is making additional tweaks to the umpire rule.All 32 teams were told in a memo from the league Tuesday that the umpire will position himself 12 yards from the line of scrimmage when the ball is snapped instead of approximately 15 yards, which was used during the preseason. The umpires must now only get beyond the deepest running back — not established in position — before the ball can be snapped.The changes should make it easier for teams to use the no-huddle offense. That should please Manning, who expressed his frustration after an Aug. 26 loss at Green Bay."The one (illegal snap) on me I thought was ridiculous, down there by the goal line when you're snapping the ball to keep them from potentially getting a replay," Manning said then.