Ok, so far I have been able to remove the border! Thank you for that!
As for changing the menu to all lowercase, I was unable to do so successfully. Any other suggestions?
Lastly, is there anyway to remove the black bar from the remainder of the pages on the site? I was able to remove it from the front page by checking “Hide From Page Header” under Appearance > Customize > Layout/Design Options > Front Page Content Options. I was unable to find a similar option for the remainder of the pages.