There is no room in the living of the BCV 1BRs to add a pullout chair or murphy bed so there has not been a change in the number of beds in the one bedrooms so I wouldn't expect a change in the occupancy numbers. It did not change at BWV when they added the murphy bed.
The booking tool for 1-bedrooms that don't officially sleep will state:
Sleeps 4 - 5th guest can be accommodated, but please note that NO ADDITIONAL BEDDING, LINENS OR TOWELS WILL BE PROVIDED.