Blog problems on spirit theme?

This is for

Screenshot 1 is a single blog post. The featured image doesn't display and the navigation/menu bar at the top is "whited" out and is suppose to be blue.

Screenshot 2 I've got a question about how the blog is laid out. I changed the Posts page to a different page but when I edited the page in upfront it reverted to how it was originally (see screenshot 2).