It's ok! those links to previous threads that I post are just for curious archive-combers. When a post is an actual dupe, we bury it.
It's true that the American Chestnut had a major thread less than a year ago, but the line that srcreigh quoted from the FAQ says "or so" to give us a few months' worth of interpretive wiggle room.
Adding to this, if you post a re-post you will be redirected to the old thread instead of your new one. So you will know that you're reposting!
(I was a little embarrassed when this happens to me at first, but I have gotten over it now. It's nice to have a computer fact check me. Even if it means my clever titles have to be thrown away!)