Even you are the creator of an (sub)wiki, the option "Request join" is active on Wiki Index

Steps to reproduce:

1. Create a new wiki (with Admin)
2. After that wiki is created, go back to the Main Wiki
3. Hover over home and click on Wiki Index
4. Even you are the creator of a new wiki you are able to:
   1. Click on "Request join" option
   2. Become a member in your created wiki

In my option, this is an issue, because if you created that wiki, you are already a part of it, so you don't need to make a request to become a member.