Mobile Layout issue

I am using Boutique template for Fashion Line online store. When I enable mobile layout (themes for iPhones, Android and Handheld) site is not displaying correctly on mobile phones. So I disabled all of this and when I view site on mobile, it looks fine, except for menu ( I am using GK Menu) that falls on the left and displays all menu and submenu items on page load (on mobile).
Does anyone have suggestions?
thanks
Branko

Hi Branko,

Can you please give me your site URL to take a look on the issue?

Thanks,

Hi Don,
thanks for taking interest in this. Ok, here is what I managed to do so far. All themes for iPhone, Android, Handheld are set to default. Also I have created new menu, for mobile users, that doesn't contain subpages.
It looks like that site renders now fine on most of mobile devices, only that on some of them it takes to reload the page so the menu would render properly.
http://www.stellaandminx.com.au

Let me know what you think,
thanks