Local storage does not clean properly on mobile browser

Question

This will make me crazy. This happens on iphone 4S Safari(IOS 6) but not on any desktop browser.

Everytime before I make a new request I flush the jStorage, on Alert test1 everything is null as I expect. But the second alert Test2 shows an older data from storage but not the "data" received and setted in success function.

How is this possible?

$.ajaxSetup({ cache: false });
$.jStorage.flush();
    localStorage.clear();
alert("Test1 "+$.jStorage.get('token')+"tu:"+$.jStorage.get('user'));

$.ajax
    ({
        type: "POST",
        url: "rs/user/token",
        async: false,
        cache: false,
        beforeSend: function (xhr){

        },
        success: function (data){
            $.jStorage.set('token', data);
            $.jStorage.set('user',username);             
            changemenu('menu.html');
            alert("Test2 "+$.jStorage.get('token')+"tu:"+$.jStorage.get('user'));
        },
        error: function() {

        }
    });

Answer 1

Turns out it has nothing todo with localstorage, STUPID IOS 6 safari caches all POST requests, so it secretly returns same token on every request..this is the dumbest thing I've seen for long time!

http://arstechnica.com/apple/2012/09/developers-claim-safari-in-ios-6-breaks-web-apps-with-aggressive-caching/

Is Safari on iOS 6 caching $.ajax results?