A couple of things that I noticed that have not been talked about yet.
When Amanda sat down to let Matt know that it was a prank, he told her that he understood why her parents were behaving the way they were in a way because it is an awkward situation and he thought that "mom" had been drinking a little to much. Apparently he wasn't to taken aback by what had happened and was not going to judge Amanda badly or harshly by the behavior. He even said that he was enjoying the conversation with her "dad" and that he really meant it. That to me says that he really, truly cares for Amanda and would still really, truly care for her even if those were her real parents.
Matt also brought presents to Chelsea's parents and Amanda's parents. He arrived empty handed for Noelle's and Shayne's HTD.