I can't add a game to my collection.

[Fededx]

I bought Batman: Arkham City Armored Edition for the Wii U, and I just can't add it to my collection. This is not the first time I'm having trouble with adding games to my collection, it's so badly designed... Can someone please tell me how to add it? Did you have the same experience with this or any other game?

If so, please share your experience, this thread's purpose is to let the web designers know if we're having problems so that they can solve them.