Fixed Header Size and # of featured content

I have two problems I am currently stuck on trying to fix at jeffblagdensports.com: One is that no matter how much CSS I enter for altering heights, margins, etc. I can't seem to get the fixed header to change height without making the font bigger. The second issue is that I cannot change the # of featured content posts to anything but 4. If I change it, the save and publish button does nothing. Thank You.