Take the MO s to your bank, see if they are legitimate. I am guessing you are distributing forged checks, which is a felony. You may end up spending years in prison for a couple of bucks.It makes no sense that he would not mail the checks directly, obviously he want his fraud to be traced elsewhere.
Very likely a scam.If he wants you to send some money back to him, it is most certainly a scam.Go to a bank and have the money orders checked out carefully. They are probably forgeries.Or contact the people to whom you are sending the MO to - ask them what they are expecting and see if they are aware of it.