Leo's guessing that Carlos has a cookie that's directing the browser to the Chinese site. He should try clearing cookies to see if that resolves the issue. Or the ISP may be misreading Carlos WiFi as "China" rather than Chino. Go into Internet Options and reset everything. It could also be Malware, a RootKit, or a browser hijack that's redirecting his DNS.
From the Chatroom: Go to IP2Location.com. If that tells him he's in China, then he'll know something is wrong with his IP. eBay has regional settings which could have been changed. eBay also has a tech note which addresses this exact issue.