The problem was that St Louis decided to decline the penalty. The referee made the announcement that the penalty would be declined and said Arizona elected to Free kick from it's 30 yd line. After hearing all this, St louis decided to accept the penalty and kick again.
I thought you had to take a timeout to change your mind on a penalty decision? St Louis didn't have any left so I thought for sure they'd be stuck with the decision they made. Guess not!