My guess is that they haven't yet taken into account different labels like the Reboot's weird labels ("Arranged by", "Composed by", "Available on", etc), and so the app doesn't recognize them yet.
Ironwestie is correct, that's exactly why! I searched and added various label variations but it's not easy to find what I'm missing... the only way is when someone randomly find them and report it to me. Now I added these cases, thanks for reporting!
I've been compiling a list of images on the wiki that need to be renamed and moved. Since only administrators can move images, I thought that I should ask to temporarily gain administrative powers and move the necessary images myself.
I'm so sorry for taking so long to reply. If you still want it I can give you Admin without needing to demote yourself, seeing that you are a huge help for the wiki and I found myself often very busy so I can't be on the wiki as much as I want.
So, if you are still interested, I could give you Admin!