it looks like a bait and switch scam but i'm waiting to hear back, before accusing someone - it could just be a programming mistake. :)
when you checkout and enter your card shipping is 12 dollars something, if you enter a promo code of 10% the email receipt shows extra 5 bucks for shipping. Probably most people don't notice? i dunno. i was for sure that shipping was 12 dollars something. so i went back and tried the order again.