Price discrimination would be a reason to do this but then it's strange that they'll ship from every website to me and have a single login. They've even recentl

Price discrimination would be a reason to do this but then it's strange that they'll ship from every website to me and have a single login. They've even recently allowed changing the language on a few of the websites. But maybe they're just changing the prices per-user in the US and can't do that in the EU so they do it per site? Whatever it is it results in a really bad user experience.