It might be a good idea to take a screen shot of your confirmations and point balance incase there is a hiccup in the computer/reservation system tonight when the new policy in implemented.
If I recall from the marathon thread, this change will not be implemented in the reservation system. It will be a manual process of cancelling points after the fact, the same way they cancel overlapping reservations within 15 days.
So, even if there are cancellations from this new rule, I don't expect to see a parting of the seas tomorrow.
That said, it is still a good idea to take screenshots.