Importing a folder with Extendscript adds extra nameless bin that I don't want

Hi, I'm writing a script to automatically import files rendered from After Effects into Premiere with Extendscript. All my projects have the same folder structure. The folder I want to import is "AE/16x9/" and I import it into a bin called "AE" which is created by the script if it doesn't exist yet. I got it working so far with this code:

importae: function() {
		app.enableQE();

		var projPath	= app.project.path;
		var projName = app.project.name;
		var projFolder = projPath.slice(0,(projPath.length-projName.length));
		var importFolder = projFolder + "AE/16x9/";

		var myFile = [];
		myFile[0] = importFolder;

		var nameToFind	= 'AE';
		var targetBin	= $._PPP_.searchForBinWithName(nameToFind);
		if (!targetBin) {
			targetBin = app.project.rootItem.createBin("AE");
		}

		app.project.importFiles(myFile,true,targetBin);
	},

The only little problem I have is that it adds an extra nameless bin in the structure as shown in the image below.

I can't figure out why it does this and how to avoid it. Hopefully someone can tell me how to fix this. Thanks!