1.  I have an odd things happening. I add my 2nd phone, and it shows up, but another "unknown" device also shows up at exactly the same time. I have done it numerous times at different intervals with same result, so dont think it is someone else hacking in.

To double check that I have deleted the corect one I shut off the wifi on my phone and this is what happens:

2.  I have deleted the "unknown device, and it shows the named one and it shows activity. I shut off the wifi on the phone, and it still shows activity. I also shut the phone off completely and it still shows activity. I am positive this is not someone else hacking into my network, I just recently had this wifi installed, I think it has to do with the odd "Unknown" device always adding in addition to the one I originally named when it was set up.. 

 Why would it add 2 devices when adding one Iphone?