I've already booked CRT and paid for it via Credit Card. If I am able to obtain a different date for CRT and want to cancel the initial reservation how does it work on my credit card? I've heard it can take a bit before they charge the amount back to your card from your cancelled reservation. I am afraid that m card will show both the old and the new charge for awhile and we will have to pay on both until they reimburse for the first charge. In otherwords, is there some way to change the date of the ADR without having to add another charge to my card while I wait for the first one to cancel?