Stop some alerts to admin user

I'm the first admin (id=1) - the user who has installed my osticket installation. I want to receive only technical mails, no ticket alerts. Can't make osticket act so. I still continue receive all ticket alers: New ticket, new message, overdue and so on. Please help me.

Here is my settings (options selected):

Settings-Email-Admin's Email Adress -> not-my-email

Alerts and Notices

New Ticket Alert:
Status: Enable
Admin Email (not-my-email)
Department Manager
Department Members

New Message Alert:
Status: Enable
Last Respondent
Assigned Agent / Team
Department Manager

New Internal Activity Alert:
Status: Enable
Last Respondent
Assigned Agent / Team
Department Manager

Ticket Assignment Alert:
Status: Enable
Assigned Agent / Team
Team Lead

Ticket Transfer Alert:
Status: Enable
Assigned Agent / Team
Department Manager

Overdue Ticket Alert:
Status: Enable
Assigned Agent / Team
Department Manager
Department Members

System Alerts:
System Errors (enabled by default)
SQL errors
Excessive failed login attempts

I've created "Admin" Department where:
Type: Private
SLA: System default

Autoresponder Settings:
New Ticket: Disable for this Department
New Message: Disable for this Department

Alerts and Notices:
Recipients: No one

Group access: Lion Tammers

And I'm the only member in it, and I'm member only of the Admins department.

My account settings:
Account Type: Admin
Account Status: Active
Assigned Group: Lion Tamers
Primary Department: Admins