Page Settings

I’ve used highend theme on other websites, but never had this issue. It appears at the bottom of one of my course lessons, all published pages are linked below, along with categories and archived blog posts. I can’t figure out how to turn this off.

Also, everything (text and videos, etc.) have no margin, everything is so far left it is almost cut off the page. How can I fix this? It’s fine on the homepage…but on the lesson pages it’s weird.