They (PM customer service) shared with me that it was 20 cards too.
So, Yoda wasn't the only one they told. That was the company line until your comment.
Both Mark and Chris on Live Chat said that 20 cards was the number for flat pack shipping.
Anyway, we'll find out tomorrow when my trick finally arrives.
They also said that originally there were 52 cards in each refill deck.
Now, we find out there is 56.
@Thokus - Man, you are not the one to toss stones - you're info is always questionable, at best.