Currently I have it setup so only moderators and admins can modify the tags categories.
This means we might miss some tags that need to be put into categories.

So in this thread please post tags that need to be added to a category.
For example:
"x needs to be in the character category."

Lastly if you have any suggestions for new categories please suggest them here.

Our current categories are:
Artist: The name of the artist who created the artwork.
Character: The name of the character featured in the artwork.
Copyright: The name of the company or series that holds the copyright to the charcters featured in the artwork. (Ex: nintendo, overwatch)
Species: Since we allow furry art to be uploaded it's important to tag the species of the characters featured.
Meta: Is for tags that describe key features about the upload (Ex: video, transparent_background)

Midnitemorty and Jeetdoh should go in the Artist category

Updated.
Thanks for letting me know about those tags and uploading to the booru.

Edit: Updated the OP to include more information.

catboymech for artist

Updated.
Thanks for letting us know.

hypnagogum for artist

Updated.

when are you going to update tags on the artist page?

I haven't setup the page yet to automatically update tags but I might in the future.

In the meantime I will update the artist tags that require updating except for artists that only have one post added.

Important to note:
I try to avoid updating tags with only one post because of a limitation with the software.
When a post gets edited all tags with only 1 post logged get reset to general because the system believes that its a new tag again.