Just noticed when I was scanning from my mac to hook onto a wifi network, it was also showing my iphone as a device to connect onto (personal hotspot). I checked the settings and personal hotspot was off, but tried to connect the mac anyway and it still connected. Workaround - swtich off mobile data (only good if your in wifi to use the phone for more than just a phone!). Not sure if anyone has seen this/corrabarate what I have seen. Bug noted and sent apple.