I don't know for sure, but if you book at 7-months you should be good. Even if you have to waitlist, at 7 months you stand an excellent chance of getting your 2-BR.
If you call at the 7 month window I don't think you will have a problem. Many DVC owners with VWL reservations switch out to the BCV or BWV at the 7 month window to be closer to the F&WF.