Works on browser resize, not on mobile device

[linseedstudio]

Hello,

Great plugin you've created here. However, I'm having a problem getting the overlay to fit the window on ipad and iphone - everything just zooms in way too much and I can barely scroll. The thing is everything works fine when I resize the browser on my desktop - overlay resizes to the viewport and the layout transitions as it should. Any idea what's going on here? The example:

http://linseedstudio.com/projects/kast/purchaseinstores.html

Thanks

Additional Note:

I just tried on Safari ios and it seems that while the overlay still exceeds the viewport width after initially opening it, changing the orientation once makes the overlay fit. Only in Safari though, doesn't work in Firefox or Chrome.