From the August 2006 USCF Rating Supplent
USCF Expiration Date: 2/28/2007
From MSA records (updated 5/16/2007)
USCF Expiration Date: 2/28/2006
In light of a number of tournaments in MSA beginning after March 2006, probably the rating supplement is correct (expiration 2/28/207) and MSA is wrong?
The information on MSA is consistent with what is in our membership records. This individual resigned his USCF membership in August 2006.
I suspect if you check the latest Gold Master file you will find it also has the 2006 expiration date.
There are a number of situations which could lead to an expiration date being moved backwards in time rather than forwards, though none of them are particularly common.