I think he's not referring to sequential double posts, but two posts in separate forum areas detailing the same news item (for example, opening a post for, say, colonial infantry in "Colonials" and another for the same figures in "VSF").
I don't think that's positively necessary, since our "new posts" are much easier accessible than on, say, TMP, where any board you don't watch closely quickly fades into oblivion (to my experience, at least).