The thread has been stuck. And double-posting is OK if, for example, you make one post to say you're going away, and then days later another post to say you're back. But don't make multiple consecutive posts if you just remembered something you wanted to add to your previous post. That's what the Edit button is for.

(Also, AC/CC used to have this too, but I think a general thread for the whole board will do the job better now.)