Mobile site looks totally different with the Jetpack's plugin
If your using the Jetpack's plugin and its "Mobile Theme" module is enabled, you might see a design totally different than Customizr for mobile devices.
What you see in mobile devices is Jetpack's mobile theme, named minieleven, hence it doesn't depends on the Customizr theme ( you can check how our theme looks like in mobiles visiting our demo site with your mobile devices -> https://demo.presscustomizr.com/ ).
To fix this, navigate through your Jetpack's settings and deactivate that module.
If you have issues about deactivating it please refer to the Jetpack's doc/support.