XF 1.5 Users secondary group is admin when they sign up


I'm still learning how things works here, but at the moment when new users sign up their secondary group is set to admin and I can't figure out where to find/change this and any help would be much appreciated. I've looked through most of the permissions stuff, so I'm thinking I may have missed something.

If you need other info, feel free to ask.
I have no user group promotions set up, and the only add-ons I have installed are Xenporta and minecraft username validation

EDIT: For some reason it's now working properly. I won't complain, but now I need to figure out how I fixed it xD