If you're going to be uploading images and placing them on pages then at least put them in the appropriate sections and make sure there aren't any duplicates before you just start adding things. It'll become tiring very fast if I have to cleanup everything so you should familiarize yourself with how things are done.
Concept and Promotional Art: This means everything from wallpapers, character portraits, official art, and so on.
CG Artwork: This means anything related to the CG in the game itself
Other Media: This means official artwork completely unrelated to any of the games and are generalized. Illustration books, promotional images for events, and so on.
Well, considering that was unable to tell where everything is supposed. I just needed someone to fix my mistakes. And thankfully, you were there. So, I'll try to put them in the right locations next time.