Header Media disabled but creating blank empty space

I have the Header Media feature disabled on all pages. For static pages, this works as intended. However, on the page for all my blog posts, it shows a big, blank empty space where the Header Media image would normally show, and also moves the page title so it's in a different place to all the others and looks inconsistent. I can't seem to turn this off or remove it. See here: https://rianfloyd.com/journal (I'd like this page title to be be the same as all the others). I'd also like to be able to remove the calendar/post date only on pages but not on blog posts. I'm not sure what the CSS is just for this. Any help appreciated.