Can't Edit the Titles on Gameplay Discussions?

The LoL Boards won't let me Edit the Titles on Gameplay Discussions, is this because it isn't allowed or is it because there's a bug? I find this to be an important feature if we retrospectively discover a Title to be misleading in comparison to the threads' content, or if we simply made a typo. I'm not sure about most of the Boards sections, but I know that at least Gameplay won't let me.