Why is my main DVR (XG1v3) grayed out on the Devices page on Xfinity.com

My main DVR (XG1v3) is grayed out on the devices page on Xfinity.com. I have an Xi3 in my bedroom that is not grayed out. I have tried restarting the box by removing the power and re-applying it. I have also performed a system refresh. This makes me think there is an issue with my account or with that box. It's strange that the Xi3 is not grayed out but the XG1 is, since the Xi3 doesn't have tuners and gets its signal from the XG1. Something's wrong...