Interesting comment from Andy that he felt that because Italiano didn't get a yellow card on the penalty, that he felt the referee was unsure whether it was or was not a foul.
I've not seen clear enough footage to determine if it was or was not a correct decision but having watched it a week ago, I think the penalty alone is sufficient punishment and no card is warranted. It wasn't a threatening position down on the goal line and was not of any force/propensity to injure the Melbourne player. I would ask why a yellow card would be given and what for?
Assuming it's a correct decision, then I think he has pretty much got it right with penalty no card.