Splice - whats wrong with this

1

i have a problem deleting movieclips attached to a empty MC and pushed into an array in the empty mc.

im using splice method.it seems doesnt when deleting mc’s randomly.

here’s the code and fla attached.

function starter(){
selectedView = _root.attachMovie("McDesign_mc","designer",this.getNextHighestDepth());
}
starter()
function attachDesignElement():Void {
	nameIndex =  selectedView.elements.length //element array defined inside designer
	clipHolder = selectedView.attachMovie("clipart","clipart"+nameIndex,selectedView.getNextHighestDepth())
	clipHolder.onRelease = function(){
		element = substring(this, 25, -1)
		selectedView.elements[element].removeMovieClip()
		selectedView.elements.splice(element,1)
		trace(selectedView.elements)
	}
	selectedView["clipart"+nameIndex].test.text = nameIndex; 
	selectedView["clipart"+nameIndex]._x = selectedView["clipart"+nameIndex]._y = nameIndex*15+40;
	selectedView.elements.push(clipHolder);
}
_btn.onRelease = function() {
	attachDesignElement()
}

if you delete 3rd mc and try deleteing a greater one (ex 5) it doesnt work.
please help