Hey Maurizio,
– the contact form on the page you linked to seems to look very fine :) could you please clarify what you mean by the form not working on the one-page template? Have you tried inserting a form into the “Contact” page?
– please update the theme to version 1.2, this is a known cross-browser issue and it has been fixed in 1.2; you can always find the latest version of the theme in the “Donwloads” tab of your ThemeForest account.
Sincerely,
Andrii / Satori Studio