I think this started when 120 Farming and Herblore was added. On my skill rankings page it currently says I'm rank 35 in Farming and 13 in Herblore. However when I click the link it identifies me as someone else, and my actual rank is higher than that.
As you can see the system seems to highlight me as Rohit and Jyreeil instead of JessePinkman, my actual account. Those two skills are the only ones where it does that though, all others are normal. I assume it has something to do with the addition of extra levels messing up the hiscores system somehow.