dublicate h1 tags in menu and widgets

Hi, this is how the theme was coded. You can find the <h1> tags for the widget titles in the theme’s functions.php file under the twentyfourteen_widgets_init() function

You could modify these to use something other than the h1 although you’d want to use a child theme:

https://developer.www.ads-software.com/themes/advanced-topics/child-themes/

That way your customizations aren’t overwritten if the theme is updated in the future.