Uanble to login to desktop user

Morning, this is my first post. I work with the Boys and Girls Club in AZ. We use Zorin. I just downloaded ver 9 educational lite and installed it. I want to protect the kids using it. So I setup an Admin account and created a desktop users account and password protected both. When I reboot, it only shows me the admin account to login to. It does not show the desktop user account to be able to login to it.

Use the [ Up } <> [ Down ] arrows on the keyboard to see if that helps !!!!
Ref: Switching between the [ Admin ] & [ user ] accounts !!!!