The current naming of the settings (width on the left, and max width on the right, here set to 90% and 1.440 px is (at least for me) misleading and difficult to understand, what that means. From my understanding, what is really means, is not “width” but the width of the inner container (= content space), and not “max width” but “max width of the inner container” (= content), as the section itself is in most cases full-width (if not further wrapped by e.g. the index template).
To become clear about the above cost me several hours, and I guess, others new to Cwicly too. So I would recommend to do some renaming in that area or to 1 or 2 line of explanation there (or both)