Waitlist “work flow” question for AKV stay

I need some info on the “work flow” for points if a waitlist is granted. We are Feb UY with a deluxe studio savanna view booked Feb 1-6 using 2027 points. Decided to add on Jan. 31 with remaining 2026 points. Have the same room type booked as my Feb 1-6 stay, but decided to waitlist CLub level for Jan. 31 since it is already just booked as a one night stay.

When you waitlist and request to replace existing stay, does it use all of those points from the existing stay before borrowing needed points? Or does it book the waitlist first so that it is secured before canceling the existing? With it being my last day of my UY, I definitely don’t want 23 points borrowed rather than using the 14 points from the current stay first. If that is how it is done, I will just cancel my waitlist.

TIA!