To clarify: points are assigned to a specific reservation when you book. They are permanently deducted from your account when you actually travel. The “Use” part of the use year is actual consumption, not booking.
You have to commit to banking points well before the end of your use year. If you do not bank them you are in a “use (consume by actual travel, not just making a reservation) it or lose it” situation.
it’s kind of like Southwest’s travel funds on a cancelled “wannagetaway” reservation. The funds have to be used with a year of when you made the first ticket purchase. not within a year of the travel date of the first purchase.