Hi! I am having the same problem. I want my top header to look like the demo theme.
https://jevelin.shufflehound.com/portfolio1/masonry-side-header/
Instead, mine are stacked plain text links. I can give you private access to my site if you send me the email I should forward the credentials to.
I have all plugins installed except for woocommerce and mailchimp. I have the portfolio demo installed as well. When I go Appearance >Header selecting any of the “Header Layout” options does nothing. The menu remains the same.