I have disabled Redirect to Primary Domain in my Settings > Domains window for my site, why is my site is still redirecting to it's secure address?

PRESSERO > *Pressero FAQs
If the requested domain address entered in a browser is not set to be secure on https, and there is another domain address for that site that is setup to be secure on https, then the site will redirect to the secure https domain address for security reasons.
For more information on Domain settings you can follow the article : Ch. 034 Domains Tab in Settings