I see one below. The other may have been posted at the same time another thread was started, and they both were assigned the same thread number (it happens rarely). By having the same thread number, the one posted first gets displayed first, but the next is ignored because while it has that thread number it isn’t linked to any other post in that thread, and only one post is allowed to start a thread.

Net lag may be the culprit in your second post, since it’s below this thread.