I'd call back. We were on the dining plan (basic) this past July and they took my CC# to hold the reservation but told me that my card would not be charged unless I was a no show. This was true for CRT, Hoop de Doo and Spirit of Aloha. The only thing I can think of that might be making a difference could be the change in the ADR system that is going on right now but....
Like I said before... if it were me, I would call Disney Dining and ask.