[TIMOB-15650] iOS: x & y positions of "touchmove" event are incorrect and erratic

var index = Ti.UI.createWindow({backgroundColor:'black'});
var view = Ti.UI.createView({backgroundColor:'white'});
index.add(view);

index.addEventListener('postlayout', onWindowReady);

var baseHeight; //Original Height of View
var baseWidth;// Original Width of View

var startX; //1st touch x
var startY; //1st touch y
var lastX; //last touch x
var lastY; //last touch y
var imageX; //x position of view at start
var imageY; //y position of view at start

function onViewPinch(e) {
    view.height = baseHeight * e.scale;
    view.width = baseWidth * e.scale;
}

function onViewTouchStart(e) {

	baseHeight = view.height;
	baseWidth = view.width;

	var rect = view.rect;
	imageX = rect.x;
	imageY = rect.y;
	
	lastX = startX = e.x;
	lastY = startY = e.y;

	Ti.API.log("onImageTouchStart => "  + startX + ", " + startY);
}

function onViewTouchMove(e) {
	Ti.API.log("onImageMove Delta Last=> "  + (e.x - lastX) + ", " + (e.y - lastY));
	Ti.API.log("onImageMove E Values => "  + (e.x) + ", " + (e.y));
	
	lastX = e.x;
	lastY = e.y;
	var deltaX = e.x - startX;
	var deltaY = e.y - startY;
    view.left = imageX + deltaX;
    view.top = imageY + deltaY;
}

function onViewTouchEnd(e) {
	Ti.API.log("onViewTouchEnd Delta Last=> "  + (e.x - lastX) + ", " + (e.y - lastY));
	Ti.API.log("onViewTouchEnd E Values => "  + (e.x) + ", " + (e.y));
	var deltaX = e.x - startX;
	var deltaY = e.y - startY;
    view.left = imageX + deltaX;
    view.top = imageY + deltaY;
}

function onWindowReady(e) {
	Ti.API.log("onWindowReady");
	index.removeEventListener('postlayout', onWindowReady);
	view.addEventListener('pinch', onViewPinch);
	view.addEventListener('touchstart', onViewTouchStart);
	view.addEventListener('touchmove', onViewTouchMove);
	view.addEventListener('touchend', onViewTouchEnd);
}

index.open();