Weird (unwanted) extra spacing

I’ve just set up my site and am having some odd issues. I’m making a webcomic and am using ComicPress, and I was testing different ways of setting up the front page. I turned off the blog post below the comic page for a while and then turned it back on. Once it was back the box surrounding the post went way higher than the title and covered the lower half of the comic page. I worked around that by adding a facebook like widget in between the comic page and blog, and that worked fine, but after adding and removing another widget next to it, there’s now extra empty space between the comic and the blog (with the widget in between). They weren’t that far apart before. Is there somewhere I can edit that could fix this? Thanks in advance.

Additionally, there’s a short black bar at the bottom of the screen below the background image that also shouldn’t be there. There’s also been issues with widgets going under the comic when they should be next to the comic (supposedly this is what happens when they don’t have enough space, but there is enough space here). No idea if these are connected.

The site is at luchaquest and is using a ComicPress child theme Foreboding, if that helps.