Users are unable to unsubscribe from groups. Upon completing the un-subscription process it is as if nothing had ever happened. They are still listed as a member, and no error was thrown. On a plus side, user's are able to subscribe to groups.
I'm also tried removing members as the groups administrator and I've been unable to do that as well.
If I try to block active members of a group I get the exception
Exception: Group membership for entity user with ID 646 for group ID 34 (Reparations) already exists. in og_membership_create() (line 957 of C:\xampp\htdocs\531573_nachosyllabus\sites\all\modules\og\og.module).
I'm not sure if there is another way to remove group members and I'm just missing it, but everything I've tried has not worked.