Hello @vanbrel,
Thank you for reaching out,
Regarding the duplicate logo, I can see only one logo at the moment.
Please check this screenshot: https://postimg.cc/gw5tgMVt.
Regarding that number, it happens because the menu template is not available anymore. To solve it:
You must unset the navigation menu from Customizer> Header > Menu > Template: https://postimg.cc/sGMNmYW4 and set the primary menu.
Or create a new template on WP Dashboard > OceanWP > My Library with your desired content and set that template on Customizer> Header > Menu > Template.
There is another way to have a different header. You can follow the steps explained at this link: https://docs.oceanwp.org/article/355-how-to-create-a-custom-header.
I hope it helps
Best Regards