Duplicate Layers to new composition? Weird problem with duplicate() command.

So I am trying to write a script that grabs selected layers and throws them into a new document that matches the origional.

But something strange is happening when I use duplicate several times in a row.  It duplicates my duplicated layers.

I start with this selection:

But end up with this result in my new doc:

This has me very confused.  I would appreciate someone looking at what I have.

Thanks for looking.

Here is the code:

var FSTdoc = app.activeDocument;

var curPATH = app.activeDocument.path+'/';

var fullNAME = app.activeDocument.fullName;

var  ABSOfull = fullNAME.absoluteURI;

var curPATHstr = String(curPATH);

var fullNAMEstr = String(fullNAME);

 

 

 

var theLayers = GetSelectedLayers();

 

 

var HLDRdoc = app.documents.add(FSTdoc.width, FSTdoc.height, FSTdoc.resolution, FSTdoc.name, NewDocumentMode.RGB, FSTdoc.initialFill,FSTdoc.pixelAspectRatio, FSTdoc.bitsPerChannel, FSTdoc.colorProfileName);

 

 

app.activeDocument = FSTdoc;

 

lay1 = theLayers[0].duplicate(HLDRdoc, ElementPlacement. PLACEATBEGINNING);

lay2 = theLayers[1].duplicate( HLDRdoc, ElementPlacement. PLACEATBEGINNING);

lay3 = theLayers[2].duplicate(HLDRdoc, ElementPlacement. PLACEATBEGINNING);

 

 

 

// function to get selected layers by paul mr;

function GetSelectedLayers() {

var A=[];

    var desc11 = new ActionDescriptor();

        var ref9 = new ActionReference();

        ref9.putClass( stringIDToTypeID('layerSection') );

    desc11.putReference( charIDToTypeID('null'), ref9 );

        var ref10 = new ActionReference();

        ref10.putEnumerated( charIDToTypeID('Lyr '), charIDToTypeID('Ordn'), charIDToTypeID('Trgt') );

    desc11.putReference( charIDToTypeID('From'), ref10 );

    // try catch to stop script

    try {

    executeAction( charIDToTypeID('Mk  '), desc11, DialogModes.NO );

    } catch (err) {

            alert("Script will not work on locked layers.");

            throw new Error("Locked Layer");

        }

var gL = activeDocument.activeLayer.layers;

for(var i=0;i<gL.length;i++){

A.push(gL[i]);

}

executeAction( charIDToTypeID('undo'), undefined, DialogModes.NO );

return A;

};