You can change your page title H1 into H2 via your Dashboard > Appearances > Customize > System > Page Title Heading.
If the problem persists, please point to specific page where we can see your two H1 tags so we can help you out. Any screenshots would be welcomed! (you could upload your images into https://imgbb.com/ and share the link here).
In this case, you can change the logo H1 in layout-***.php files in the themes/roneous/template/header folder. For example, the layout-standard.php file, you can change the logo H1 as below (line 24) :