Weird LiveJournal Links

I don’t understand. I looked at my stats tonight and I have all these referrals from Live Journal sites belonging to people I don’t know. When I go to check out the sites in question, I don’t see any links to me. They all seem legitimate, so I don’t think it’s referrer spam. I just don’t get it.

Unrelated: has anyone used Super Duper, the semi-shareware backup utility? Any opinions?