UPDATE: Both charges were refunded to my credit card. The reservation is still showing up in my online Hyatt GP account; hopefully it will work to just pay at check in.
I have recently written about how I achieved Hyatt Passport Gold Diamond status through the Elite Trial Offer. My first order of business as a Diamond member was to use one of my Diamond Suite Upgrades (DSU) for a trip I have reserved (and pre-paid) at the Hyatt Regency Grand Cypress Orlando in June. Little did I know I would be charged a large fee for Hyatt Diamond Suite Upgrade.
I initially made the reservation through a Best Rate Guarantee claim that was approved.