thebest is right . if someone earns 2 yellow at the end of 1st round then he will miss the 2nd round game. but the players earning just one yellow in 1st round will have no card with them once they start 2nd round.
about that ronaldo scenerio, i think he would be offside even if the ball is not directed to him.
When The Going Gets Tough, The Tough Gets Going.