The 'Milk' Sign

Yes, one of Benson's favorite things is milk. And, although he can sign with his hand for milk, we are still uncertain if he really knows this means 'milk'. While trying to teach him to bring his two hands together to sign for 'more', this suspicion was confirmed when Benson did the 'milk' sign with both hands and then brought his hands together to imitate 'more'.
Wait... I thought signing was supposed to eliminate confusion in communication.