I don't know about things changing when the NVR reboots because I haven't rebooted it since tweaking settings. I have learned, however, with the settings that are available on the NVR and/or PC client:
- Change setting directly on the camera.
- Change it to the same thing on the NVR.
- Check that it hasn't changed on the camera, fix if needed.
- Check setting on the PC client, change to match if needed.
...And round and round until they all say the same thing, and it stays that way for a while. I haven't figured out which setting location has priority, or how they interact with one-another.