Mobile version instead desktop version

When I go to the default page of my site in my desktop pc, the mobile version appears. How can I fix that?

you can see this in www.vistamedica.com

Go to the backend of your site in the options of penguimail template and check the default layout parameter.
It must be set to "default"

Go to the backend of your site in the options of penguimail template and check the default layout parameter.
It must be set to "default"

obviously is set to default, there is another problem I can't find.

Do you have any plugin for mobiles installed that isn't configured right and redirects to the mobile version??

Hi

Please tell me also what PHP version You use.