Homepage Logos and Blog Page Info

Hi! I have two questions: 1. I have a youtube video set as the header media on the homepage. I want to put a 400px width logo on the top and it will only left align it and not center it on the page. *my brain hurts over this one* 2. Is there a way to remove the post category and author from the "Blog" page. I just want it to have the title, excerpy and link to read more. I have the pro version and I feel like I'm struggling more than I should to customize.