Q: iOS8 iPhone Personal Hotspot questions

I have some questions about the Personal Hotspot feature of my iPhone.  I have set it up and have it operational, but there are some quirks that I can find answers to.

1.  How do I tell what device is using my personal hotspot when it is on WiFi?  All I can see is the banner that says there is a connection.

2.  When I have the personal hotspot feature turned off in settings, and another device that has previously used the hotspot connects to it from their wifi settings, that turns on the hotspot on my iPhone.  How do I prevent that?  And How do I remove previously connected hotspots from the client iPhone wifi personal hotspot list?