Great question!
As mentioned, DVC inventory and Disney Resorts reservations (CRO) inventory are totally separate. There are some technicalities and legalities involved here, but basically, DVD (the operating company for each DVC property) has virtually nothing they're allowed to turn over to CRO to sell for cash until much, much closer in than 11 months. Further out than 60 days, the only cash inventory there should be is "breakage" - which are points that a member has traded for a cruise or a stay at some non DVC property. Breakage can be turned over to CRO when it happens. So not seeing cash villa availability for next summer, but some in February, is perfectly normal and the way its supposed to work.
This issue is a two-way street also. DVC members often complain that they can't get a room on points, yet see cash availability for villas.
The problem is that we all tend to think of Disney as one big entity whereas it's actually a collection of separate operating companies. In this case, legally separate businesses with different governing laws, rules and contracts in play.
Steve