You would have 50 points to book at the 11 month window at AKV. At the 11-month window, you can only use the points you own at that resort. Points you own at other resorts cannot be used until the 7-month window.
You can add on 50 points at either SSR or AKV. At AKV, you have to purchase at least 100 points to get the $8/pt incentive, so the price for a 50-pt add-on would be $101/pt until June. You would get the same UY as your SSR contract and would start with points for your 2007 Use Year. There have been reports that the supply of 2007 points is pretty limited, so once those run out purchasers will get 2008 points with their purchase.