You may notice that there is one administrator who cannot be removed from access to aspects of your account. This admin is designated as the Account admin.
This special admin as "root access" to the service and cannot be removed or restricted. Thus the Account admin cannot become locked out of the system or blocked from overseeing all other admins within the account.
The special "Account admin" can view/edit all objects within the account (Templates, Scenarios, Procedures, Groups, etc.) and cannot be blocked/restricted.
Typically, this special admin account is not advised for daily use and should be secured for use in recovery/maintenance situations only.