From what I remember, for me it ONLY showed up as a single “Thing” device - which I took as that it knows it is a Zigbee device and its address, but other than talk to it, it has no idea what kind of a device it is. But once it was added, I could go into the IDE and set the type manually. It could be that it found another device on your network, or if it is same device, maybe for some reason it added two of them, but if it works fine, I would not worry too much about it