OK, you click "By rank" or "Name" to sort.When you click "By rank" they sort by rank for sure.
I think they do have the 3rd tier and 4th tier ranked! For example, two of last year's 3rd tiers, Southern Ill and Southwestern are the top 4th tier schools, listed as one of the first schools in the tier 4th rankings. In the tier 3, newbies like Chapman are on the bottom. So it does make sense that they have actually ranked them without assigning a score.