you can also report spamming (posting and reposting over and over again about the same thing is called spamming in my location) its that little button to the left of the post called report icon.

after you click the report icon a page comes up with a space that you fill in for the reason why you are reporting that post. most that I know ( including me here) put the words repeat posting on same issue. then the moderators check the repeated posts, sometimes they merge the threads and posts together and other times they remove the repeated posting. Im guessing this is so that the boards stay neat and not loaded with a bunch of repeat threads.