ranks that don't make sense

TOP TIER
1. D Chi, Sig Chi, Pike, Acacia
2. ATO, Sig Ep, Lambda, AePi, TKE
DU gap
3. Phi Psi, Sig Pi
UPPER MIDDLE TIER
4. AGR, Phi Who, TDX,
5. FIJI, Far Sig, DKE
MIDDLE TIER
6. Kappa Sig, AKL, ZBT, Skulls
LOWER MIDDLE TIER
7. PiKapp. Sig Tau, TEP, APD
BOTTOM TIER
8. Asig, PKT, Pi Lamb, AZ, ADPhi
9. Mudhouse, Treehouse
10. DTS, Triangle