Im sending apps this month for schools that will allow my app to be reviewed with my previous score. It seems its standard policy for schools to hold off reviewing your apps until after December scores post.
I contacted LSAC and they said that a refund check will be mailed to you approximately eight weeks after you take the LSAT (December LSAT in your case).
I believe they mail you the refund after you sign up for a real administration. I've forgotten if it comes in after payment or after you take the test but I recall one of their info emails mentioning which it is.