Password stopped working for cloned site

Hi, I had a site cloned to a new domain by my hosting company.  After I did this, I logged into the admin panel, and everything seemed fine.  Not this morning, I can't log in to the admin panel.   Any idea what might have happened? 

What is the latest for recovering admin passwords?  The "forgot password" link does not recognize my email address.

ok, never mind - fixed it.   The admin profile record just disappeared, and since it was a cloned site I was able to copy it from the database and make a new one.

Why would it disappear though?  As I mentioned, I had logged on the night before.  Could it have been hacked?