I don't know if I'm missing a button or something but if I have auto target set to off and am adjacent to 1 enemy and an ally the game will not let me progress without choosing the ally as a secondary target. If I switch auto target off and play the card again it only chooses the enemy for a single attack. Am I missing a button or option to not select a second target or is this a bug?
There is a button in the bottom right hand corner that says "Done." Click that and you should be fine.