Comments on posts are missing and are messing page layouts

My problem is this. Whenever someone makes a comment to a post on my website, the comments do not appear and somehow the center background image as well as my sidebar are missing. Below are a couple of examples:

https://www.immortalhulkhogan.com/main – that is how my website normally looks

https://immortalhulkhogan.com/main/?p=588 – this is how posts with no comments appear; the page looks the way it is supposed to.

https://immortalhulkhogan.com/main/?p=770 – after someone made a comment on this post, the sidebar is now missing as well as the center background image and above all, the comment is nowhere to be found. Every time someone makes a comment, it’s like driving a monkey wrench to the post and screws the entire page up.

I have no idea what this is about or anything. If you need to see the coding to certain parts, let me know.

Thank you!