I have no problem with pre-orders being backdated one additional month's worth of CP on Dec 1. If you ordered before Feb 1 2010, you get 400CP on Dec 1 plus your regular stipend on your anniversary date. If you ordered on Feb 1 or later, then you only get it on your anniversary date stipend.

Disclosure: I bought my LTS on February 12, 2010. So I would not be affected.