[Can't complete deck - no cards]

Here's a pic. Hope I did this right:

 

[Can't complete deck - no cards]

First you have to diskard all extra cards then move on and then add the missing cards.

I did. The only slot I have left is this one missing item on one character. Hitting the arrow doesn't let me move on.

[Can't complete deck - no cards]

I recently started playing and had to banish an item and now only have 6/7 items I need for my characters. There are no cards in the bottom slot at all. What do I do?