You'll have until the end of March 2008 to bank those extra 2007 use year points. That's because the 25% banking deadline for a June 2007 use year is the end of the following March.
13 is less than 25% of your total annual allotment and you won't have any other 2007 points in the bank, so you can use the 25% deadline. With a June use year, there is no banking allowed in April or May, so don't forget to bank those 13 points, LOL!
Congratulations on your purchase and WELCOME HOME!