"Article specific Head and Footer Code" can not change admin setting

Under “Article specific Head and Footer Code”

There are check boxes that should allow the admin to:

“Select which post types will have Article specific section. Default is post and page.”

These default settings for post and page can not be disabled. To me, a check box is an option. These settings do not seem to be optional. When I change them to un-checked, they go back to being checked.

I do not want to allow authors, editors, etc, or even other admins to have to have the ability to interact with the header/footer on a per page/post basis.

Is this a bug or an oversight, or is this the expected behavior for the plugin? If it is the expect behavior, I would like to request that it be changed so these check boxes can be un-checked. Or, have another method to restrict non-admin users from seeing the metabox options.

Thanks for your very useful and helpful plugin ??

https://www.ads-software.com/plugins/head-footer-code/