“users on the same level cannot edit each other.”
Actually, users of the same level *can* edit each others posts. If you log in, then click “view site” and then click on the of “Edit Post” links that now show up on the home page, you can edit anothers posts. This is not protected anywhere except in the “Edit” section of the admin pages.
– There should be something between draft and publishing, at “ready-to-go” state where posts don’t go live until they have been seen/edited by an admin.
Generally, I consider “Draft” to be the stage you are talking about. Private would be “im writing it and thinking about it” stage.