Hello Krahenbuhi, thanks for purchasing Thefox!

There is a plugin you are using that is overwriting our css you can add this custom css to fix the problem ( thefox > styling options ) :

@media only screen and (max-width: 767px){ 

header, .header_bottom_nav { display: none !important; }

}

This should fix the problem!

Also, I don't know if you have done it yet but if you could rate our theme 5 stars on theme forest,it would really boost our team motivation!

You can do it from this page : http://themeforest.net/downloads and click the stars under the download button of our theme. Thanks in advance! 

Do not hesitate to contact us if you have other questions :)

Have a nice day!

Regards