I booked it online and even though I have the dining plan it charged my card instead of just using it to reserve the reservation. My card was charged $210. I found out the next day when I got my daily bank balance text. I immediately called and they refunded me. However, she had to cancel the first one, then make the 2nd ressie. This was a birthday breakfast before the park opened, so I was very adamant that the time slot stay the same. She ended up getting me one 5 minutes earlier, so all was OK.
I would just call and get one for the day you want instead of doing it online.