Keep known devices from discovering new devices and changing names

Configuration
1

I am setting up device trackers and having an annoying issue with known_devices. I’m using asuswrt and my problem is that it keeps pulling in every device on the network. I wouldn’t really have a huge problem with that - guess I can deal and just set track: no - but then it’s also changing the names of the devices I DO want.

I’m using:

device_tracker:
  - platform: asuswrt
    host: 192.168.1.1
    username: !secret routerUser
    password: !secret routerPass
    protocol: telnet
    track_new_devices: False
    hide_if_away: False

and I have also tried:

device_tracker:
  - platform: asuswrt
    host: 192.168.1.1
    username: !secret routerUser
    password: !secret routerPass
    protocol: telnet
    new_device_defaults:
      track_new_devices: False
      hide_if_away: False

So with the devices I DO want to track, I’ve changed the name on them to:

Steven:
  hide_if_away: false
  mac: AB:CD:EF:GH:12:34
  name: Steven
  picture: !secret stevenPicture
  track: true
  vendor: unknown

But when I reboot, it changes “Steven” back to “android2875612873568273” or whatever the hostname is of my phone, thus breaking my automations/groups that are using the proper name.

How can I configure it in a little more detail? I’m about to just set that file as read-only once I get it the way I want it, but I have a feeling it will get mad at me if I do…