I don't see that ad when I look (even in Google Chrome). AdPlugg works on the UTC (Coordinated Universal Time) time zone which is linked to GMT (the time zone for England). So the ad will end on the End Date at approximately 11:59 PM. Scheduled ads may also be cached by our systems for up to an hour. It's possible that they are cached in your browser for up to an hour as well. Does this sound like what you are seeing? You could try clearing your browser cache, issuing a hard reset (F5 or CMD-R) or viewing the page in Google Chrome's Incognito Mode.