There's something wrong with the galleries Cachelor created. They all have bold text, and there isn't a button the turns the bold text back to normal. How would you fix it? I think the best way is to delete the page and redo everything.
PS. I think the text on the galleries for the TV episodes should say "Images from the TV episode" instead of "Images from episode," because there's a difference between the internet and TV episodes.
The Custom user tag? Well, first you must be as a admin. Go to the MediaWiki:common.js and add the codes there. It a very advanced option so you may need to learn how to use it. I don't have fully experience with it too. As I often copy the code from someone and edit it little. For the colors you can use the MediaWiki:common.css to change colors. And can go to those pages and see the examples at the section "user tags".
Let me explain: I take screenshot with my iPhone (can be vary, this time 10 minutes). And than I send it to my PC, and renamed it (up to 10 minutes). And than. I'm uploading image on the wiki (10 minutes). And put all of them in order (5-10 minutes). Upon everything is ok, I pressed finish, but instead, I got a message that there is a edit conflict due of you uploaded it while I was in process of uploading. I was supposed to upload those images.
Users that is not logged in. You can still edit as anonymous but with limit edit functions. If someone is not logged in, and someone make a edit, on the activity will appear "edited by 'a wiki contributor'".