The first link isn’t an actual feature, that’s a bug/exploit. It’s not supposed to be a thing.
I believe the reason that this isn’t a feature is because there’s still a true leader - Netblaze - but there are others with rank 255 permissions (other than owner-specific permissions), meaning they can’t be demoted by the leader. That’s a major security flaw to groups. In your case, it’s probably not an issue - but in a huge amount of other cases, it’d be catastrophic to the group.