Artie to confirm, I'm going to remember what you recommend: don't clone back. Always erase and get a new OS.
But then after you do that you are then forced to use setup assistant? Pity you can't just go straight to migration assistant, there should be a check box, "use the same user name as before....?
Setup Assistant will do exactly what you want. It's basically the same as Migration Assistant except that it opens in a system that is not set up. After SA is finished, your system will be exactly the same as the one that you imported. I know; I've done it myself when migrating from one computer to a new one.
On the other hand, did you want two accounts that have the same name? Just clarifying.