@dethompsOWU Thanks for the admin id.
I think what was happening when you changed full-page for templates to be no and for campaigns to be yes was that ckeditor added the outline html (html, head, body elements) before your existing html instead of wrapping that. That is why you saw an empty email.
Possibly ckeditor didn’t recognise the first element, meta as being valid content for when full-page is no. My recollection is that it does usually wrap content with a body element when full-page is changed from no to yes.
I have manually edited the html of the campaign in draft status, id 303, and now the structure looks correct and is kept when moving away and then moving back.
When you create a new campaign the outline html should be provided automatically.