Google Maps showing wrong current location
===

I am using google maps in my sencha touch application. And I am using current location as true. But some time I am getting my current location different some time.

Below is the code I have used to show map.
            
       this.map = new Ext.Map({
        mapOptions : {
            zoom: 12,
            navigationControlOptions: {
                style: google.maps.NavigationControlStyle.DEFAULT
            }
        },
        useCurrentLocation: true,
    });