FlyerTalk Evangelist, Ambassador: World of Hyatt
Join Date: Jul 2001
Location: NJ
Programs: Hyatt Globalist, Fairmont Lifetime Plat, UA Silver, dirt elsewhere
Posts: 46,919
There is a difference between getting a confirmation with the cost of the suite on it and being charged.
Often right after the reservation is made, the confirmation goes out with the cost on it and it is followed by another one showing that it is for a DSU. It's happened to me on just about every DSU booking.
To actually get charged is completely different, and that is an error. However, if the charge only showed as a pending change, it is very possible the system did it automatically when the reservation was made and wouldn't actually make it to the "sale" part of the credit card bill.