You only get the 11 month window for the number of points you actually own at a resort. If your reservation requires you to use more than what you own, you have to either wait until the 7 month window opens, or make a partial reservation at the 11 month window and then complete the reservation at the 7 month window.
Some multi-resort owners reserve the weekdays at the 11 month window and then add the more costly weekend nights at the 7 month window, as those tend to book more slowly than weekdays.
To reserve a standard view at BWV, you almost have to use the 11 month window. Those ressies are very, very tough to get at 7 months.
Congratulations on your pending purchase - perhaps I can be the first to say -
WELCOME HOME!