When a boss blind makes a card be face down, it still gets ordered in your hand just like it was face up. so if I have an ace face up and a face down card to the left of that ace, I know it is an ace. if I have a five face up and a face down card to the right, I know it is a five or less. if I order by suit I can further determine more information about the exact suit, or ruling out certain suits.
I assume this is not the intended behavior.