[TIMOB-15855] iOS: dynamic zIndex value not being applied correctly

var w = Ti.UI.createWindow({orientationModes : [
	    Titanium.UI.LANDSCAPE_LEFT,
	    Titanium.UI.LANDSCAPE_RIGHT
	],
});

var card=[];
var centrePosition = (512);
var cardSize = 150;
var distance;
var touchX; 

var colors=['red','blue','yellow','orange','purple','white','gray'];
var position = [(centrePosition-300),(centrePosition-200),(centrePosition-100),(centrePosition),(centrePosition+100),(centrePosition+200),(centrePosition+300)];

for (var i=0;i<=6;i++){
	card[i]=Ti.UI.createView({
		width:150,
		height:100,
		backgroundColor:colors[i],
		left:position[i]
	});	
	w.add(card[i]);
}

var lbl = Ti.UI.createLabel({
	color:'white',
	top:100
});

w.add(lbl);

function arrangeZIndex(){
    for (var i=0; i<=6; i++) {     
       var distanceFromCentre = (card[i].left - centrePosition) + (cardSize/2);
        card[i].zIndex = Math.round(100 - (Math.sqrt(distanceFromCentre*distanceFromCentre)/100));
        Ti.API.info("card "+(i)+" zindex:"+card[i].zIndex);
    } 
    lbl.text = "card red zindex:"+card[0].zIndex+" card blue zindex:"+card[1].zIndex+" card yellow zindex:"+card[2].zIndex+"card orange zindex:"+card[3].zIndex+" card purple zindex:"+card[4].zIndex+" card white zindex:"+card[5].zIndex+" card gray zindex:"+card[6].zIndex;
}

function fingerDown(e) {
	touchX = e.x;
}
 
function moveCards(e) {
    var distance = 0;
    if(touchX != e.x){
        distance = e.x - touchX;
        touchX = e.x; 
    }
	for (var i=0; i<=6; i++) {
	    card[i].left += distance;
	}
}

w.addEventListener('touchstart', fingerDown); 
w.addEventListener('touchmove', moveCards);
w.addEventListener('touchend', arrangeZIndex);

arrangeZIndex();
w.open();

[INFO] :   card red zindex:95
[INFO] :   card blue zindex:96
[INFO] :   card yellow zindex:97
[INFO] :   card orange zindex:98
[INFO] :   card purple zindex:99
[INFO] :   card white zindex:100
[INFO] :   card gray zindex:99