I have a trip planned and booked with the current 28% off code. My sister who is also on the reservation in the same room just got a pin for the 40% off code. Can I call and apply it even though the deposit was made with my credit card? We cannot get together for a couple of days so I do not have her info (credit card # etc) to make the change. She did give me the pin code. She is afraid she will mess up things so she wants me to do it. Another question is that we may add a day to the ressie since it is such a good deal. I hate to call WDW and get everything messed up as I already have the ADRS made. Thanks