If you own points at more than one property, how would it work?

For example: 100 points at Beach Club/March and 50 points at Boardwalk/October. If we wanted to make a reservation at Beach Club at 11 months out, we can only use our Beach Club points there at 11 months....we couldn't use our points from Boardwalk there, only at the 7 month mark if there is availability?

I am sorry if this doesn't make sense, but I am confused as to using points for different resorts.