So when you logged in as you for the first time on her phone did it create that new user account automatically or did you have to go and add a new mobile phone?
When I log in to my wife’s phone and try to add a new mobile phone I get this message: “This mobile phone is already set up as a mobile presence device.”
When I look at the list of things on the ST app or on IDE it only show’s one mobile presence device and that’s my phone. Either I’m doing something wrong or there is some specific process or trick to get her phone to appear as another device. We’re both iPhone users so not sure if that’s causing any issues. I noticed from your screen shot that you’re using an Android phone while your girlfriend is an iPhone user.