Diane, try calling back and asking for them to check with the manager. You may have just spoken to someone who didn't know. I made my reservation with the person who answered the phone at the front desk and it was no problem at all. It could depend on availability. Did you ask for September 6th or another date? They had good availability on the 6th. Tom.
PS: Even if they made a mistake with me, the full price of $90 is not bad for a room and a ride to the airport.