TandLMommy28,
We ran into a similar situation when trying to reserve one of our stays. Paul said that it can sometimes be hard to book at the 11 month mark for a few reasons. Below is an email he sent me explaining the situation. I am sure he would not mind that I share.
"First, at the popular resorts we have to work to find enough owners with home resort status to cover the demand which can be extremely difficult. Second, even when we have a member with Home Resort Status at a particular resort, their points may not work for an 11 month rental because the points may expire prior to the arrival date. And third, we pay the owner 50% of the funds due them at the time that the reservation is made. We withhold the last 50% until the day of arrival as a safeguard. Because of this some members do not want to wait 11 months to receive their final pay-out and opt not to make the reservation."