Bobby,
You probably need to clarify this with your crews. When we played @ Bishop Kelley in week 8, we were trying to go hurry up and catch them changing players. We snapped the ball (with them having 14 players on the field) and the head official blew his whistle and said we had to wait until he whistled the ball ready for play. The linesman on our side explained that since he was setting the ball we had to give him time to get into position.