Yeah, it's nothing more than concentrating on the game at hand. For the rookies there is so much to think about it's easy to see how team direction gets confused Even I (

) will now & then point in the wrong direction, especially during lower level games that are less than close.
Using the benches as a guide is a good idea, just make sure you get the teams started in the right direction. Another great idea given to me when I was a rook is to just shout the team color without pointing. The teams know which way they're going, give them a few seconds to move in the direction you're going then calmy point. Always works!