I'm focusing entirely on the guarantee. Yes, the "Exciting Deals" say they're only for new bookings. But read the guarantee: nowhere does it say "except for Exciting Deals." It says to get a price adjustment to these, your booking must meet "special conditions," but those seem to be either (1) you didn't actually book, or (2) you booked with a refundable deposit, cancel, & rebook. In either case, your original booking will not get a price adjustment. This is why I suspect these "special conditions" where you can price adjust to an "Exciting Deal" don't actually exist.