This might be the sticking point that confuses quite a few people. Moderators will only get the moderator permissions for a specific forum if they are actually assigned as a moderator of that forum.
So, if you have a Forum where Moderators Can view the forum, but your moderators aren't actually assigned as moderators of the forum, they won't be able to view it.
It catches a lot of people, but it's one of the only ways we were able to make it so you could assign moderators with different permissions on different forums.
Once we redo the CP, we'll try and make the UI better so this isn't quite as confusing.
