Layout broken on iOS for RTL language

I am using P2 at wp.com (https://microjp.wordpress.com). When I open it in Safari and Google Chrome on my iPhone 5 (iOS 6.0.1), the layout is broken, both circumstance in show/hide sidebar.
My language is set to Uighur, a RTL language.
I checked https://wppolyglots.wordpress.com on same iPhone, it has some problem, too. I doubt that there is some issues in CSSs, both for LTR and RTL.
Could you check and solve it? Thanks.