Xfinity Steam; Welcome, This device can only access Xfinity Stream on your in-home Xfinity network.

I have two houses with Xfinity:

1) House #1 -- internet, TV, phone (a million channels). This is listed as the primary account in my Xfinity account.

2) House #2 -- internet, TV (limited channels )

Both accounts are linked. The Xfinity stream app is working fine on my phone with all of my House #1 channels. 

House #2 has a Samsung Smart TV. I am getting an error message when I try to connect the Xfinity Stream app. It says: "Welcome, this device can only access Xfinity Stream on your in-home Xfinity network..." There is no error code.

I've checked the network -- it's the House #2 network -- have logged in and out/uninstalled/reinstalled the Xfinity stream app/basically everything I can think of -- been on the phone with 4-5 agents (one of whom deactivated my internet trying to help...) -- no one can seem to fix this.

Is it because House #1 is listed as my primary? I was under the impression (after talking to Xfinity when I was setting up House #2 install of services) that I would be able to stream my House #1 channels to my House #2 Samsung TV via the Xfinity Stream app. 

I'd appreciate any help in fixing this. 

ETA: OK, I spoke to Xfinity Tech Support -- which is not the regular support -- and they told me I need to get rid of the TV on House #2 for this to work. They couldn't remove it -- so I will have to call during the week when sales is open. I'm worried that this isn't going to fix it and it's just going to be more of a mess.