11. Have you cross checked your redirects and cross links?

If you maintain separate URLS for mobile versus desktop, then anytime users access your desktop page from a mobile device, you'll need to set up a redirect to the appropriate mobile page. Don't redirect all desktop access to the mobile home page. That's not what the user expects or wants. The same holds for mobile to desktop, make sure to link to the appropriate page. Don't link them all back to the desktop homepage.

9. Is your entire site crawlable?

Google recognizes three different configurations for mobile devices:

Responsive Designs where the layout adapts to the screen size.
Dynamic Serving where web servers send out different HTML depending on the device's UserAgentString.
Separate URLs that serve different code to each device, on different URLs
Irrespective of which method you're using, if Googlebot can't crawl your site properly, it will impact your search results. Make sure the Googlebot can see your site like an average user. Keep your CSS, JavaScript and images crawlable. You can check your robots.txt with this tool.