You should ask the author of the theme but as you have no buyer badge on this account you will need to login using the purchase account so the author can verify the theme license.
Ok, looks like I have indeed 2 different profiles, how do I connect the right one here, please @charlie4282?
When I sign out and in again, the forum takes over the same login without asking again…
It looks like a CSS thing - it happens in the main demo too http://bravotheme.com/demo/bizone/wp/ so you probably just need to adjust the CSS or background colour options in the theme options.
And yes, it does happen also in the main demo. The difference here is that I do not see the navigation in this header bar, at all…
Support ticket submitted.