Yeah, the fact is you cannot edit your older posts (though I don't remember how long "older" means, but it's pretty short). That way, we all have to take responsability for what we write, just like on a mailing list. But the mods try to mark the post as solved when that's the case.
BTW, this post should be moved to "Discussions about forums" I suppose.
Co-leader of Mageia's packaging and development team (dev). List of packages I maintain.