Ah, I see why. Where-as the links for both the actual working pages have a space, ala https://www.fakku.net/manga/tags/dark skin
The buttons at the bottom lead to https://www.fakku.net/manga/tags/dark+skin
I assume it's the same with all 2 word tags as well. I guess a temp fix is just to substitute the + in the url to a space untill Jacob can fix it.