Also agree Sub!
Explained it to us begining of the game. Figure it out! We liked him and would take him anytime. Besides who cares if we wont tell you the time. Its a 90 minute. Keep a watch on your sideline!
He explained subs at center not the waiting part. As for the 2 yellows they were given to the first 2 players entering the game at the same time, not two seperate times.