I thought I'll like to bring up that I thought it was pretty much app design 101 to make the app user friendly, and reduce the no. of clicks to get something done.
With both this and Imperial Assault game app, it's really annoying that you have to click into each item once in Collection to select you have ownership of that expansion to be integrated into the app. I wish they would design it, so you can just click each of the collections just once to add your collection with a checkbox icon or something and another button if users really want more info about that expansion.