Here are our responses;
– Header Image
RESPONSE: The header image is called, if you disable the slider section. Including a header image page layout is a pro theme feature. Please do update to get that option, including lot’s of useful and advance features with priority support and free demo setup service.
– Bloguten Author
RESPONSE: You need to assign a page with a feature image for the Bloguten Author Widget.
– Single Post Page
RESPONSE: It seems, your site single page is working properly.