I notice you are missing the first wallpaper in the online store. It's the Meji and Ellis seated on Engawa one. I'm not sure if this is intentional, or if you missed it. It's my favorite one, so I was just wondering.
Edit: I probably wasn't clear enough. I am wondering if the Meji and Ellis seated on Engawa wallpaper will ever be available for purchase from the online store. I am not sure if the online store is missing other wallpapers, because the only reason I noticed that this one was missing was because it is my favorite one.