Updating who receives those email alerts can be modified in the my account page of any admin.
Here are the steps:
Log into an admin account
Click My Account in the top right corner
Click on the red Manage link in the grey box on the lefthand side
Click on the red Edit link in the grey box on the lefthand side
In the field next to Order Notification Email(s) update the emails you wish to receive notifications.
Scroll to the very bottom of the page and click the blue Save button
