A Script for Adobe Illustrator to Duplicate Items Hor/Ver with Margin

ai_DuplicateItems.jsx

// A Script for Adobe Illustrator to Duplicate Items Hor/Ver with Margin
// Originally by https://github.com/hilukasz
// Modified by Mohamed ElShahawi (ExtremeGTX)



app.userInteractionLevel = UserInteractionLevel.DONTDISPLAYALERTS;
var doc = app.activeDocument;
var selected = doc.selection;
var selectedHeight = selected[0].height;
var selectedWidth = selected[0].width;
var OriginX = selected[0].position[0];
var OriginY = selected[0].position[1];
var repeatAmount,
      myInput,
      splitInput,
      margin,
      selectedPosition,
	  Direction;

// Run
userPrompt();
Direction == 'v' ? DuplicateVertical() :  DuplicateHorizontal();

function DuplicateHorizontal(){
	selectedPosition = selected.position;
	var newItem = selected[0].duplicate( doc, ElementPlacement.PLACEATEND );  
	for(i=0; i< repeatAmount ; i++){
		var newPosX = selectedWidth + newItem.position[0] + margin;
		newItem.position = [newPosX,newItem.position[1]];
		doc.selection = null;
		newItem.selected = true;
		var selectedPosition = selected.position;
		newItem.duplicate( doc, ElementPlacement.PLACEATEND );  
	}
}

function DuplicateVertical(){
	selectedPosition = selected.position;
	var newItem = selected[0].duplicate( doc, ElementPlacement.PLACEATEND );  
	for(i=0; i< repeatAmount ; i++){
		var newPosY = selectedHeight - newItem.position[1] + margin;
		newItem.position = [newItem.position[0],-newPosY];
		doc.selection = null;
		newItem.selected = true;
		var selectedPosition = selected.position;
		newItem.duplicate( doc, ElementPlacement.PLACEATEND );  
	}
	newItem.remove();
}
function userPrompt(){
    myInput = prompt('Margin, Repeat Amount, Horizontal/Vertical','10,5,v');
    splitInput = myInput.split(",");
    margin = Number(splitInput[0]);
    repeatAmount = Number(splitInput[1]);
	Direction = splitInput[2].toLowerCase();
}

Hello,
it looks that script creates 2 more copies of the selection
12 instead of 10
And at the end of execution 2 shapes are selected
How i can fix it?
Regards

@SimoSP
Unfortunately, I don't have illustrator installed now, but make sure you are selecting only 1 object at time, may be there was another another object selected by mistake.