With Ramires, I can tell you it was almost certainly a combination of stupidity and the ref not seeing it properly. It was definitely intentional and he probably did realize the ref was unlikely to give a card.
As for the return leg, it should be interesting. Mourinho teams are notoriously hard to beat at home, and the away goal is going to force your team to attack, which is what we like. We will likely try to blitz you guys for an early 1-2 goal lead, and then set up shop for the rest of the game.