Where do you see different user names ?
Are there different names shown in the Oticon App , or in Genie2 ?
Can you show/upload an screenshot ?
Probably the HA devices were set/programmed with a device name. And it is possible to change this device name in Genie 2. Just connect with NoahLink Wireless and look inside Genie2.
It is also possible to give programms a different naming. In Genie 2 you can rename programm names ans give any name for a programm.