[Mailman-Users] added 2nd admin & archive help needed

[Ray Newman]

 I am new to mailman offered by my web site host company.

I have two questions I could not find answer in FAQ.

1.
I have url  and my own password for owner admin for my list
If I add 2nd admin does he have to share same url and password I use?

I would prefer if he can not change my password.

2.
Also I would like to delete test messages in archive.
(from when I 1st setup not later)

Thanks,
Ray