I can't speak for the Vistana Villages, but we've stayed at the Vistana Resort many times. Most of the units are two bedrooms, and some are two bedroom lock offs. The two bedroom lock off option has two separate living quarters (kitchen, bedroom, etc) but both do not have jacuzzi tubs. There would be one jacuzzi tub for the larger one bedroom of the lockoff. Think of it as one premium one bedroom with full size everything (including the jacuzzi tub), and one bedroom (the lockoff) as an efficiency unit, with kitchenette and no jacuzzi tub.
The two bedroom units are beautiful and I've found the Sheraton staff very accommodating if you decide to get two (2 bedroom) units and ask to be near each other. You can make any room requests directly with the front desk.
You can see what I mean on the room layout page here:
https://www.vistana.com/destinations/sheraton-vistana-resort/villas