I honestly feel like it's an error if it's not related to a refurb. I agree the BCV refurb seems to be progressing, so probably not that. And it doesn't seem fair that it would be related to the BWV refurb because they would be blocking out BCV owners at the 8-9 month point to save BC rooms for BW owners (seems unfair).
I also feel like it would be unfair to any DVC owner (not just BCV) if they were blocked for any other reason than for a refurb due to the fact that all DVC owners now should have had 7 month windows open for early Sept. So whatever they are "saving" those rooms for, blocks out real DVC owners from using their points at BCV. So if it's not a refurb, it seems like a violation.... or maybe more likely, an error (an IT glitch?, but glitches usually are fixed in a day or two). It might be time to complain to DVC.