Page header background /

Hi! I have two problems: 1) I have problems using an image with the 'background media'. What I actually want is to have an image behind the site title on all pages, preferably one I could rotate from a pool of images. See this page: https://www.jeroenkloppenburg.photography/my-gear/ But, depending on the browser size, the image bleeds under the menu. I do not want that. I only want it to have behind the site title and stop where the menu starts... How can I do this? 2) On my homepage I used 'Featured Slider' to show a few galleries. But it is showing old posts. I would like to have it show the last added posts from that category. How can I do that? Thanks! Third theme I bought from you.