这是个BUG,只在CHROME浏览器会有这种情况，清一下浏览器就好了。
Thank you for reading this post, don't forget to subscribe!在IE浏览器和火狐浏览器 都没有这种情况
Update
http://howlingwolf.de/blog/2011/12/magento-cookie-fuckup-chromesafari-webkit-engine-stuff/
https://magento.stackexchange.com/questions/796/magento-cookie-bug-with-webkit-based-browsers