Header image not showing

Re: https://www.driftlessprairies.org
I am learning Atahualpa and had a friend help me with switching my site to this theme and she included a Revolution Slider for the home page. This widget is inserted into a Home_slider_or_pix widget on the far right hand side. I want to upload images for other pages but when I include them by adding the Image Widget underneath this and check the page I want it on, the pic show up underneath this Rev Slider and no on the pages I want them. If I add them under header_slider they don’t show up anywhere. I have to think I’m doing or not doing something very simple, but am at a loss as to figure it out. Thanks for the help!
Marci