The fourth and fifth floors of BCV are done. The floors lower than that have not been started. We do not know when they will start working on those floors.
At BCV, there are two types of 2-bedroom villas. They are officially referred to as a "2-bedroom villa" and a "2-bedroom lock-off villa." People use the phrase "dedicated 2-bedroom villa" for what DVC calls a "2-bedroom villa."
You said you booked a dedicated 2-bedroom villa. From the DVC member website: 1 king-size bed, 2 queen-size beds, 1 queen-size sleeper sofa.
As far as I know, all dedicated 2-bedroom villas have 2 queen beds in the second bedroom. I am not aware of any of the 2-bedroom villas having 1 queen bed and 1 sofa bed in the second bedroom. I'm sure someone will correct me if I'm wrong.
In my personal opinion: you should do a request with DVC Member Services and make that request for 4th or 5th floor. Don't make any other requests if you want to be on one of those floors. BCV is always fully booked, and there aren't a lot of rooms. If you try to get fancy with a very particular room request, you might end up with something you don't want. Here is a link to BCV floor maps:
http://www.parkinfo2go.com/dvc-bcv/floor1.php
To get to Stormalong Bay and the buses and the Beach Club lobby, you go out the same exit of BCV. That exit is where the very tiny BCV lobby is. See the big arrow on the bottom left of the maps from the above link.