Plex Live & DVR not letting me enable some channels

I have an outdoor antenna on 25 foot pole hooked up to a HDHomeRun EXTEND. I am able to get other TV channels that normal setups are unable to. There is a few independent tv stations and other networks where I am unable to link it within the Live and DVR settings in Plex.

I am unable to map and enable virtual channels 4.1, 4.2, 4.3, 4.4, 33.3, and 58.1

I am able to receive and stream these channel directly from the HDHomeRun EXTEND box to my PC using VLC, but can not get Plex to enable it or see it.

TVFool.com Data:

HDHomeRun EXTEND Channel Lineup:

Plex Live and DVR Settings:

I have same problem.
It is the ID & scan frequency etc that are wrong.

Fks for me having: DVB-C, Denmark, Provider: PARKNET they have to be these settings:
Netværks ID 100
Søgefrekvens: 450 MHz eller 450000 kHz
Modulation QAM 64
Symbolrate 6875

The problem is that the default settings are wrong and that it is not possible in plex to type manually the correct settings.

Has anyone figured a work around? I have the same issue.