UPDATE: The store is now fixed. If you have any trouble with the store, specifically if you are not given at least two shipping options for your order, please email schlockmercenary at gmail.com. We'll be watching closely to make sure that orders are being process properly.
Just a quick note -- the United States Postal Service issued a rate change in advance of pushing the appropriate API to everybody who consumes it, so for the moment the shipping options in the Schlock Mercenary Store are limited and a little inaccurate.
We'll let you know when everything's fixed. If it takes more than a day or two we'll extend the Boxed Set Bundle discount for another week.