Issue duplicating compound path item on new layer

Maybe this will help...here's the full script. The basics are this...I open Illustrator, select this script, open a product AI file to change the background color/text colors (there are more colors, but wanted a simple test), then open a brushed stainless background template AI file and copy the black text and braille dots over. Because the word 'ROUTE' has 2 compound paths - the R & O, it fails to properly copy them over. The enclosed areas are filled in. 

Results:

Full script

#target illustrator

// Color array
var pColorNames = ['blue', 'black', 'white'];
var pRed = [ 0, 16, 255];
var pGreen = [ 75, 24, 255];
var pBlue = [135, 32, 255];

// Returns just file name
//alert('File name: ' + app.activeDocument.name);

// Returns full path & file name
//alert('File name: ' + app.activeDocument.fullName);

// Open the file to porcess
var myFile = File.openDialog('Select the product file to process...');
if(myFile != null) {app.open(myFile);};

// Get file name without full path and change extension to 'jpg'
var tempFileName = myFile.name.replace('.ai','.png');

// Get active document
var doc = app.activeDocument;

// Extract destination directory and save
var fullName = myFile.fsName;
var dFolder = fullName.substring(0, fullName.lastIndexOf("\\"));
var destFolder = dFolder.concat('\\images\\');

// Create images folder if it doesn't exist
var imgFolder = Folder(destFolder);
if (!imgFolder.exists) imgFolder.create();

//////////////////////////////////////////////////////////////////////
// Loop for WHITE raised signs
//////////////////////////////////////////////////////////////////////
var NewFileName;

for (x=0; x<=1; x++) {
workTheMagic();
};

////////////////////////////////////////////////////////////////////
// Loop for BLACK raised signs
////////////////////////////////////////////////////////////////////

var blkColor = new CMYKColor();
blkColor.cyan = 75;
blkColor.magenta = 68;
blkColor.yellow = 67;
blkColor.black = 90;

// Change raised objects to black
for (x=0; x<doc.pathItems.length; x++) {
if (doc.pathItems[x].fillColor.cyan == 0 && doc.pathItems[x].fillColor.magenta == 0 && doc.pathItems[x].fillColor.yellow == 0 && doc.pathItems[x].fillColor.black == 0 ) {
doc.pathItems[x].fillColor = blkColor;
};
};

for (x=2; x<=2; x++) {
workTheMagic();
};

//////////////////////////////////////////////////////////////////////////////////
// Special stuff for BRUSHED STAINLESS sign
//////////////////////////////////////////////////////////////////////////////////

// Open the appropriate BMS file to process
var bmsFile = File.openDialog('Select the Brushed Stainless base image to use...');
if(bmsFile != null) {app.open(bmsFile);};

var srcDoc = app.documents[1];
var targetDoc = app.documents[0].layers.add();

for (i=0; i<srcDoc.pathItems.length-1; i++) {
srcDoc.pathItems[i].duplicate(targetDoc, ElementPlacement.PLACEATBEGINNING);
}

// Change file name
newFileName = tempFileName;
newFileName = newFileName.replace('xxx', 'brushed-stainless');

// Create new export file
var tFile = new File(destFolder + '/' + newFileName);

// Export file as GIF to product image folder
exportToPNGFile (tFile);

/////////////////////////////////////////////////////////////////////////////////////
// Close documents
//////////////////////////////////////////////////////////////////////////////////
var aiDocument;

aiDocument = app.activeDocument;
aiDocument.close( SaveOptions.DONOTSAVECHANGES );
aiDocument = null;

///////////////////////////////////////////////////////////////////////////////////////////////////////////

function workTheMagic() {
// Change file name
newFileName = tempFileName;
newFileName = newFileName.replace('xxx', pColorNames[x]);

// Create new export file
var tFile = new File(destFolder + '/' + newFileName);

// Change color of background
doc.pathItems[doc.pathItems.length-1].fillColor = makeColor(pRed[x], pGreen[x], pBlue[x]);

// Export file as GIF to product image folder
exportToPNGFile (tFile);

}

///////////////////////////////////////////////////////////////////////////////////////////////////////////

// Create new RGB color object
function makeColor(r,g,b) {
var c = new RGBColor();
c.red = r;
c.green = g;
c.blue = b;
return c;
}

/////////////////////////////////////////////////////////////////////////////////////////////////////////////

function exportToPNGFile(dest) {
if ( app.documents.length > 0 ) {

var exportOptions = new ExportOptionsPNG8();

// set PNG export options
exportOptions.antiAliasing = true;
exportOptions.transparency = true;
exportOptions.artBoardClipping = true;
exportOptions.horizontalScale = 100;
exportOptions.verticalScale = 100;

// export and save file
doc.exportFile ( dest, ExportType.PNG8, exportOptions );
}
}

Thanks femkeblanco, 

Definitely headed in the right direction. I replaced the pathItem lines with your code and got the 1st image. Soooo, how do I get both the pathItems and the compoundPathItems. If I use my code and yours I still get the 2nd image. I'm guessing there needs some sort of typename check but am unclear how to do that.