How in the heck do you do it?

I'm so hopelessly lost here. Everything is like some crazy maze. -__-

You can't have two different "author's notes" boxes, but assistants can edit previous author's notes, so maybe have the author put up the page and write his/her notes, and then you can add your own notes to those (or the other way around).

You can edit pages and author's notes by clicking "My Account", the title of the comic, "2. Comic Pages", and then clicking the "edit" button next to the appropriate page.