I suggest that that YES (maybe) you can do what you propose to do, and in my experiance it all depends on the actual dates of the November check in date that you want, the date that the LCUP points expire, and if on the last day of "before 60 days out" that the November date is still available in the system for you to book .
In other words it depends on the date your LCUP points expire and the date of the November reservation and availability. on the last day (or before) in September that your LCUP points expire , and if your November reservation is within 60 days of that LCUP Expiration date, then I believe that you could make a reservation using a combination of the LCUP and CUP points. (if you can wait that long) (and if then the dates you wanted in Nov are still available and within 60 days of you making the reservation.
EXAMPLE: Say the LCUP points are good until late or Mid September, say 15 SEP 2021 as an example ?, Thus if the NOV reservation is going to be with in /60 days of 15 SEP ( and thus before 15 Nov or so) and you indicate to the system you want to make an LCUP reservation, I believe that the reservation system will first take all the (still good) LCUP points available, then take the remainder needed from the CUP points available. The system is, and has been, for me, very good at always taking points in the proper order of what's best for the member. , i.e. the oldest points first. Assuming all the dates are within the rules also.
SO, I would call MEMBER SERVICES at 888-619-2988 (Not Owner Services) as soon as you can (Monday morning), and ask them if you can do what your proposing. But only if the LCUP points you are proposing to use will be and are still good within 60 days out before the date of the November reservation date that you want and have not yet expired in September.
( so the later your LCUP points expire in September determines how late in November you can make a reservation (during September)... if somethings still available for November in September, and if you have a combination of September LCUP Points and 2022 CUP points.
Perry