Several of those levels appear to be wrong. Here's what shows in my Duty Finder:

Sastasha: 15-18
Tam-Tara: 16-19
Copperbell: 17-20
Halatali: 20-23
Toto-Rak: 24-27
Haukke: 28-31
Longstop: 32-34

Haven't unlocked beyond that due to errors and work.