Hi There,
Thank you for the credentials, first I want to clarify that any page that you created in Visual Composer (or any page builder plugin) is not editable in Cornerstone, and the other way around. With that said you need to let go of your old pages that are built on VC, and re-create those on CS from the scratch (this should not take time, if you already have the content and you’re already familiar with CS)
A couple issue that I saw on your site when investigating, that needs to be addressed: first is it seems you deleted your caching plugins without clearing it, what happens is your site is still serving the caching residue even though your caching plugins are not present anymore. Please reinstall that caching plugin and clear it and all your other caching feature. Deactivate it after Clearing but don’t delete.
Second is you have 3 instances of X Theme installed on your site, but none of them is the latest version (5.2.5) and none of them is installed correctly. Two of them was not named x, one of them which is the active is named x but it’s not in the correct folder, it’s inside another x/x folder, so that is also wrong.
To correct that, please switch to a default theme (Twenty Fifteen), then delete all of your (3) current X Theme. Download the latest X Theme (5.2.5) here and install it on your site, after installed activate it and re-validate it. Install it like you normally do a theme installation. Appearance > Themes > Add New > Upload.
Keep in mind that your current theme (4.6.4) is outdated and a lot of things/features have changed and added, you can check that out on out changelog page. This means that there might be some settings on your Theme Options/Customizer that has been reset and need to be re-configured.
Let us know how it goes,
Cheers!