Hey - I may have asked you this before but could you remind me - what browser and operating system? Do you have any additional plugins on the browser, or any settings disabled? We're struggling to reproduce this at the moment, so any info would help!
Win 8, Chrome, NotScript, Adblock Plus, Ghostery (JS enabled though). Effect: new lobbies don't show up or (possibly) only with a big time delay (after a refresh you might see an 11/12 lobby that wasn't there before) - might only happen after being connected for a while, or maybe after having played a lobby
I just joined a lobby as second demo. The main page still showed the demo slot as available, for at least a minute or so. When I refreshed, it showed both as taken.