It's not as though they were isolated incidents yesterday - Aloisi's missed a lot of easy chances this season. I remember in our first round win against Sydney he put one onto the post from a foot out: a horrible miss (luckily for us) that would've put them 2-0 up and just about killed the game off.
He also missed a pen against CCM before getting asked to retake it because a CCM player encroached.