Return shipping cost for free submissions

Anyone else notice that the return shipping fee for the four free submissions is higher than than the return fees for other submissions? Being a member is still a good deal, but why the higher fee for the free submissions?
US Navy CWO3 retired. 12/81-09/04
Looking for PCGS AU58 Washington's, 32-63.
Looking for PCGS AU58 Washington's, 32-63.
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Comments
My freebies shipping form was $15.85 from 05/01 and the current rates are $13.50 and I was charged the lower no problem.
Pennies make dollars, and dollars make slabs!
....inflation must be kicking in again this dollar says spend by Dec. 31 2004!
Erik
Anyway, two of my submissions that are in the system now, require me to imput my zip code for identification. This is because the two numbers were recently used in June of 2002 for other submissions.