Treasure: Maybe your location is screwed up only when you go to the checkout as happened to me the very first time I encountered the issue (as per my first post in this thread), and that's why he couldn't see anything wrong when he sent you the message.
moonshineshadow: Maybe. But that is why I put a screenshot to show that something was not working correctly. And I mean why does the support tell me to go to my settings, that has nothing to do with the issue at all.
Well, I don't know then, I put screenshots too (namely the screenshots that appear as attachments in this thread), so either you too had to put an arrow to point the part that wasn't working correctly (dunno, maybe he didn't understand what exactly was wrong) or you had the "wrong" support guy try and help you. Anyways, I cannot offer you much help apart from what worked in my case (namely, delete cookies/have the browser delete them upon closing it and wait for any possible pending orders to expire befiore trying again). I guess I was somewhat lucky then that I quickly received a correct suggestion from support...