I've never exchanged back into a Wyndham resort, but I know that when I exchange into Disney, the reservation information transfers and I am in the Disney system at that point. I'm in their system with my name, address, phone number, anything that came over from RCI. Assuming the same thing happens with exchanges into Wyndham, they would have your name and contact info from RCI which I presume would match your info in Wyndham's system, but I presume it would not contain the Wyndham owner number specifically, nor would it show in your Wyndham online account. So it only depends on whether Wyndham is cancelling reservations with matching name and identifying info, or if they are going one step further and only cancelling if there is also a matching Wyndham member number involved. I don't know the answer to that question, though.