Just breifly looked over some of this stuff last night. Not sure on your last question.
It looks like 4 per episode. With the universe turned on, if you just set up a 1 on 1 match and play it thru. When you finish that match gets added to the card with the result. Replacing them in order.
If you turn off the universe with the right analog stick and do the same thing, it looks like the match is just exhibition and has no results on your universe. Could be wrong on that, but seemed that way.