My Citi VAN # stored in my gold passport account finally had a balance of less than $10 when I saw some good prepaid rates @ Hyatt Miami Blue. Although I have used the VAN # many times at many Hyatt properties (sometimes the limit is less than the rate), they never charged my card since I am a Diamond member. Since the prepaid rate was for only for 48 hours and I made the reservation in a hurry without changing the CC #, which is the VAN # with limit <$10. I don't know how, but they charged full price for both nights. They didn't call but simply went ahead and charged ~$425.00 with the Citi Van of limit $10. How is it possible?