Hey all, was abit of a oversight on my part when I coded this. I didnt realize that when you closed the browser, it would expire the tag that the front page was looking for to disable the ad banners for premium.
I have now fixed this issue. So long as you logged into forums once a month (Same terms as paid subs) You should not see ad banners within QJ.net unless you clear your cache, logout or use different PCs/Browsers.
Sorry for any issues this had caused, I was just now informed of this issue.