This means that you've started a group, but have not joined the one you want to be part of. Two things need to happen:

First, have the leader/organizer of the fraternity you are trying to join invite you again with your email address. Then accept that invitation you receive via email. Second, in the home panel on the app, click the two arrows in the "my fraternity" section. You will then be able to toggle to the fraternity you are trying to be part of.

Did this answer your question?