Replying to Order of threads in forums all messed up

In the main forums, the threads are ordered descending instead of ascending by minute and then ascending by hour. Example, at the top of the page the thread was last view 59 minutes ago, the one below it 57, 56, etc.. until you get to the bottom where it is 1 min or less. After you get to the point where it has been more than an hour since the thread was last viewed they go back to ascending order (1 hour, 2 hour, 5 hour, etc...) Is this a glitch or was it supposed to happen? I am running Safari on OSX...