A note :
I have been asked a lot about my header in particular. It’s a theme upgrade via CSS customisation and is the only way, to date, for modifying the default size of the header image. I am not well versed with the technical/CSS side of things and everything that has been done here is due to reading the abundant material available on WordPress and the answers to questions I posted on the support side. I would encourage you to do the same and you will get better answers than I could give. Definitely, more accurate ones!
So, please, refrain from emailing about the layout of the site, simply because my answer would be exactly the same as this. Good luck!