I am a Comcast/xfinity Triple-Play customer.......TV/Internet/Phone. My mobile phone account is with AT&T. Whenever I receive an incoming call on my home LAN line, my cell phone also rings. The call is not being forwarded.......it is just ringing on both lines. Why? How do I eliminate this? The only way I have been able to stop this is to delete the xfinity connect app from my cell phone. Thanks.