I have a mysterious 2nd router join my Internet network Home

I have a mysterious extra router in my Xfinity internet account. They must think I'm stupid.. I'm not stupid.. I see it! A lot of apps tell me it all the time ... I Can do some command Prompts, I can find it, I can download certain programs that will show me every single time... I can give the Mac ID How Come. Keep reading go down under this pic

nobody seems to care !???? My ISP dont. by the way these screen shot do not pertain to this issue what so ever. I just thought they were kinda Interesting I was shocked to see diff

results then before lol