Sometimes people who have multiple reservations might want to manipulate the points. Trying to think through …
I have no banked points, but all current and future points. And I have a June use year. (I hope there is a June UY, if not we have to use July and it’s July 2nd).
I book a week in November and use most of my current points, June 2021 points.
I then decide to book a few days in February so I have to now borrow points.
But there’s a chance I won’t be able to go because I might not be able to get time off.
So I might need to cancel that reservation, but that means those points are now stuck and would have to be used by the end of May. And I know that isn’t possible.
What I need to do is use those borrowed (2022) points for the November stay, So I need to switch them. That way if I cancel in mid January I can still bank those points by the end of January deadline.
That’s more of a switching issue, but the premise is the same. If you borrow points for a riskier visit close to the end of your use year, you want them to be used for the safer reservation.