What you saw about 16 resorts were posts referring to a waiver of ROFR used for resale purchases created by someone at DVD in July which suggested that post Jan-2019 resale purchasers could reserve Riviera. Whoever prepared it was both wrong about resale purchasers reserving Riviera and about whether there were two resorts at AKV, which view was apparently based merely on the fact that the reservation system is set uo to reserve each building separately. DVD recently realized that waiver was an error and withdrew it.
As to wheter they could make Kidani and Jambo separate
DVC Resorts now, which would be a material and fundamental change to the POS for the resort, the answer is legally no unless all the member owners of AKV (not just DVD as a proxy) actually vote to make the separation, something that will never happen. DVD can, of course, turn it into two separate resorts in 2057 after the current AKV DVC Resort expires.