I'm sure it would be fine. I had a reservation booked through Marriott.com and it pulled up the BA rate...but after a couple more searches, it pulled up a weekend rate on the website. I didn't realize until later, but the hotel didn't say a thing. I mean, you put in the dates and if the website pulls it up and gives you a confirmation number...you assume it is fine, right? It's not like you did anything to work the system.