No this isn't the weirdest numbering system ever. It's a puzzle for you to solve. The person who sends in the correct answer first, gets a prize. Not really.
8. Wolves of the Calla
7. The Stand
3,4,5,6. L.E. Modesitt Jr Chronological Read-Thru
2. The Great Divorce
1. The Blind Assasin
2. The Towers of Sunset
1. The Passage