I'm not sure you understand Use Year. You won't get your 2007 points until 12/1/2007, and you won't get your 2008 points until 12/1/2008.
With a December use year, you are still in your 2006 Use Year.
If you're looking to stay in October 2007, then that would be by using 2006 points. You could borrow 2007 points if you want. You cannot borrow 2008 points for a Vacation in October 2007.