I haven't seen that episode. But it kind of defeats the traditional explanation of how transporters work. Unless we go with the "we can exist as beings made of energy" which is always a popular type of alien or alternate being in Star Trek. And the classic transporter accidents don't make sense, then. When a transporter clones someone, who is the real one and how would you figure it out? Most of the accidents only make sense if you treat a transporter as a digital device that moves data.