I think I found
I received a paypal and this member is placed automatically in the admin group.
I do not know how to find the paypal link and I have not quite seen the list of groups. View attachment 45346
sorry for disturbing atmosphere .
If its PayPal related to purchasing an upgrade, I would check your settings for any paid upgrades you've defined. But as Brogan said above, you can only add administrators / moderators through the ACP and they won't have complete access to your site except as defined in Usergroup Permissions.