Welcome aboard!
As PP said, call your guide, they MAY be able to help.
Secondly, in case you are unaware, the waitlist fulfillment application runs on a schedule multiple times a day. When someone cancels, that room goes back into inventory. It is VERY possible for someone to grab it before it gets used to fill a waitlist request.
You are looking at a busy
DVC time. THE VGF only has AT MOST 47 studios (to put this in perspective, the Poly is going to have 360!) It gets very hard to book if you do not do it at EXACTLY 11 months out, and I mean to the day!
I would book any days you can in your vacation, create the necessary waitlists, and CHECK CONSTANTLY for at least a couple of weeks. If people are walking their reservations, availability can change constantly, However, I do not think people are walking at the 10.5 month mark. It is usually done at the last week prior to the opening of the 11 month window.
For example, if you look to book 11 months from today, for one week, the first day is already done in both studio classes, with the rest of the week wide open. Ressies are being walked.