If you directly type in the URL OR if you search from google and click on the link, sometimes you get the mobile theme and sometimes you get the full desktop version. There seems to be no pattern to which will be displayed.
1. There are no caching plugins on the website.
2. we are using a child theme on the Genesis framework GenesisVersion: 2.2.5
3. the mobile theme we are using is Now
However, the same server has other websites on it using Mobile Theme Switcher and those websites work fine, while this one does not. Did you see how it will only occasionally show the mobile theme in a phone?