Hi Whitney,
No, you're not overlooking anything!
I am not exactly sure about the answer to your question because the Quarterly is from 1931, so I'm fuzzy on events after that.
My best guess is that we ran through the Greek alphabet with Gamma province, so they moved onto another letter to denote your geographical location. If you look at a map, you'll notice that the Theta chapters are primarily in the South.
Anyone else want to take a stab at this?
