I initially had the same problem - tried to book Oct. 5-8 - nothing available. Played around with the dates online and was able to book ASMo Oct. 2-8. Called CRO to have them reduce it, and while asking about any passholder rates, was told that ASMu was available from the 5th-8th, so I changed my ressie. This is a common tactic, especially on short stays. Some of the value resorts will only allow 4 or even 7 day ressies, even though space is available, so you have to resort to booking a longer stay and then reducing the number of days.