Are you sure you have enough copies of that link there? There are only four, and two of your paragraphs don't have one.

(If you're trying for some SEO thing, please note that links from LW comments get rel="nofollow" on them and therefore don't provide extra googlejuice. I wouldn't be at all surprised to find that Google gives less weight to a link when it sees several instances of it in rapid succession, because that's a thing spammers do.)