This happened to me with Expedia. They advertised a lower rate on a different room at the hotel I was looking at... Didn't catch until after I checked out that

This happened to me with Expedia. They advertised a lower rate on a different room at the hotel I was looking at... Didn't catch until after I checked out that the advertisement was for a different day than my search results. (Because obviously I'm just as happy to stay at a random hotel just off the interstate in rural Ohio a week after my trip as during it?) Thankfully, Expedia has good customer service and fixed things for me, even though it was not a cancelable reservation.