If you haven't updated it then it could be the Godaddy, you should contact them about that.
As for the header, you should assign it as global, please note that assigning a header to the blog page will not assign it to the archive page. And your news page is a category page and not a blog index page.
I'm not sure what you mean that it is no longer applied, it's still on our feature request list and not yet implemented (header assignment for taxonomy pages like category, archive and so on).
The only workaround, for now, is assigning it as global so all pages including taxonomy pages will use the same header.