Whenever you get this message "FYI Sorry! We have flood-control activated. You cannot post within a certain number of seconds of your last post. Please try again after this period of time elapses. The current number of seconds required between posts is: 30 � Please use your browser's back button to return. " Then you think that your post is actually not posted so you post it again but when you open the thread you can see two same posts on the thread. So either this message should not be there or please prevent that leakage
You get that message if you hit "add message" twice in a row. The first one gets applied to the page and the second gets ignored. You go back and resubmit and now you have two. When you get the message it means either 1) you went really quickly from forum to forum to add a post or 2) you hit the "add" button twice by accident.