Well, OP is going to find out how quickly the CC and reservations systems talk to each other.

Given that there is $25 at stake, I'm not sure that I'd spend a lot of time on this. If it works, it works. If it doesn't, it's $25.

As jdrtravel points out, this is why businesses spend time on their t&c and tighten them up from time to time, thus causing rants on FT. Now, people know why.