When I attempt to join regional, I select the correct region and save. Every time it says that I will be listed once my stats are updated. Originally I though it was going to work eventually but after a dozen or so stat updates I don't think this is going to resolve itself.
For the record if someone can do this manually I'm seeking to be listed under Canada > Ontario > Toronto.
If it helps I used my Warlock K/D (1.93) to verify that I'm not listed.