Forums and topics not indicating new posts  

Hello, I was hoping someone here could help me with what I think is a configuration issue with the forums. I installed wpforo a couple days ago, and for the most part I love the functionality. It has a lot of things my previous forum plugin didn't, and is very fast (another issue I've had with others) which is a godsend. However, there is one issue I'm having that is cause a lot of troubles, and that's having forums and topics show when there's a new post.

In every forum I've ever used, different boards and topics usually indicate when there is new content; if there's an unread post in a thread, then both the thread and the forum containing it will have their name bolded, and typically darker; if it has already been read, then it will simply appear as a normal link. This behavior is not what's happening however; When I first created the forums, all of the forums showed as bold, as though there were new posts (even the boards that were empty), and once I had visited them once, they went back to normal. Since then, however, it doesn't matter how many new threads are posted in a board, it never indicates such.

The same is true of threads: the first time a thread is created, its title will appear bolded, to indicate it is new, but once I check it once, it will never change states, even when there are new posts added that I have yet to read. I went poking around the settings, but the options don't have much in the way of descriptions. Is there something I need to turn on or off to enable this functionality?