My waitlist for October 7th in a SSR studio finally came through! I've been checking it nearly every day and had almost given up. In fact, I told the friend I'm meeting down there that I didn't think it was going to happen. Anyway, I was just checking the official site to see how long I've been on the waitlist (for another thread) and I saw the reservation for Oct. 7 on my vacation details. Yay!

Now I don't have to move in the middle of my vacation and I'll have
DDP for all nights of my stay!
yxe dad, here's what I understand of the waitlist process:
1. Do I have to call MS to find out if my waitlist has come through, or will they call me?
You don't have to call them, but they also won't call you. When the waitlist comes through, they will send you a written confirmation. If you want to check the status, the best way is to look on Vacation Details on the member website.
2. When is the last possible day MS will keep that waitlist active? I have to cancel my cask ressie 5days in advance!
They automatically keep it active up to 30 days before check-in, but if you ask, they will extend the waitlist until the check-in date.
3.Because I have 3 ressie #'s for 5 nights what are my chances of staying in the same studio for those nights. I asked MS to make note of my cash reservation on the 2, 2 night point stays.(hopefully it will work out)
I know that if you ask for waitlist nights to be combined with your original ressie, they will do that. The official site shows that I have 5 different reservations because of waitlist nights coming through, but I called Member Services and they told me that all of my consecutive nights were combined. I don't know how the cash reservation would fit into it, because I was planning to stay at a different resort for my one unreserved night. My guess would be that if you asked them to note the cash ressie, they did so and it would appear in your file at room assignment.
Good luck with your waitlist!