Marketpress Notification Email Tweaks

Can you please advise on how to modify the notification emails received by customers to remove the line:
"Shipping: FREE"?

We do not offer shipping and this line is causing confusion for our visitors. Please see attached screen shot.

I have attempted to remove the shipping info from the Notification settings as well as toggling off shipping in the store options, but this does not seem to affect the output for the notification emails.

Thanks in advance.