While using the browser in the "Metro" interface, the website loads so slowly that I cannot play any videos nor can I even log in. The desktop browser seems to work only slightly better. Also, why am I forced to wait through a 30 second ad every time I go to the website. As a paying customer I don't think I should have to deal with that kind of annoyance.
It's probably clearing your session or cookies every time you leave a site. But, you should be able to skip the ad by clicking the link in the top right of the browser window. Or, possibly, you bookmarked the wrong page.