Apparently you can't change the joining permissions in cults. Is there any way I can fix that or should I just fill out a ticket?
I don't actually know if UA's can do it.? I remember someone said there was something they couldn't help with-with cults but either way no, you won't be able to do anything to fix it yourself.

I've never seen that option work, and I've been member for more then 2 years now :S You'll probably have to wait untill the cults are rewritten untill they fix that, but I have no idea when they are going to do that.