Travelling

[OFoley]

Folks, I've been confused over a call that was made in a game last week.

Player A dribble drives toward the basket. He comes to a stop with the "one-two" step. His left foot is the lead foot, his right foot the back foot and also the pivot. He proceeds to pivot on his right foot looking for a way to get free. He sees an opening and jumps off of his front foot (left), lifting the pivot foot off the floor and shoots. Both feet were in the air when he shot, but he jumped off of his non pivot foot. Travelling was called. I was not sure if the ref made the right call. I don't understand what is different in this scenario than just any player dribbling and jumping off the same foot the the traditional "one-two" motion. Please tell me the correct way to call this play.

Thanks,
Matt