Entire section nesting inside a card on publish

Hey guys, can’t wrap my head around this one so posting here for help if anyone’s seen anything similar.

It’s likely a problem on my end, I’m redesigning a heavy site with over 1,000 CMS items and first created it in a very messy way. There may be some code or some inherit behaviour, but basically when I publish this particular page I’m working on everything looks fine in the Designer, but in the live site the entire main section of content is winding up nested in the ‘footer’ element in the bottom left of the sidebar.

I’ve gone top to bottom and can’t figure out why this is happening. Have attached screenshots below and a read only link. If anyone can help I would be indebted!



Here is my site Read-Only: LINK
Here’s the staging page preview link: LINK

Update: I fixed it by dragging the ‘main content’ above the left sidebar in the layers panel but still not sure why this was necessary