This is because the center level options are not configured to use a local email address.  Rather, they are defaulting to the national email.

To correct this, switch to the specific center with the issue
Select Center Level Options
Step 2 Center-Level Contact Email Address:
Enter the email address to which center-level notifications should be sent. If you check this box and enter a value, this address will replace the site-level address in session tags such as the following: [[S0:SITE_CONTACT_EMAIL]]
Check the box to override the default, and replace it with the correct local email.