Issues with navigation, and duplicate comic under navigation

Hi so I’ve been having two issues that I can’t find anywhere else.

The first issue is that there is a white box around my navigation buttons that I can’t seem to make go away. I’m not very good with css, and I haven’t found anything related to this. It shows up on every navigation graphic set, and doesn’t go away even if I enable the default navigation. It first showed up when I disabled the default navigation and selected one of the graphics. This was before I added my custom one, so that wasn’t the issue.

The second issue is that on every page except the homepage, underneath the navigation and above the panel with the title and tags it shows a cropped, smaller version of the comic page. It’s really obnoxious and I’m not sure how to get rid of it. Nothing i’ve messed around with on the edit comic section or on comic easel’s config have affected it, so i’m not sure what’s causing it

I would really appreciate any help I could get. Like I said I know very little css and this is my first time making a website. Thank you!

The page I need help with: [log in to see the link]