In the Designer and Preview modes, my website CMS grid/list layout is correct and shows as follows:
Desktop - 3-across
(but on published hosted site, shows 2-across)
Tablet - 2-across
(but on published hosted site, shows 1-across)
Mobile - 1-across
(displays as expected everywhere)
I’ve tested Firefox, Safari and Chrome (latest updates + Mac Sierra latest update [NOT High Sierra]) in both regular and private/incognito modes.
I’ve also followed some instructions by @Waldo (hey, I went and changed the class names of the elements to match the viewport they exist on via duplication/renaming)
The dynamic item elements have these Widths:
Mobile-Dynamic-Item-Animations: 1 00%
All dynamic list elements are all set to Settings Tab > Layout > Full Width.
UPDATE: I’ve restored a previous backup version of the site, and am working forward from here… I’ve even added the “?ac” to the designer, and messed around… no matter what I do, the issue still persists.