Tvheadend

I've used an Australian region with my dual tuner card, and it works but I'm missing 2 groups of channels. That's quite a few missing when there are only 5 groups in Australia in total.

I tried VDR as well, and it picks up all the channels so it's not the antenna signal or tuners, it must be something to do with the way TVH works compared to VDR? Can someone provide some help with settings or config that I oculd tweak or is that just the way it works?

It's a shame, as it was pretty eay to install and configure, and works easily in Kodi as well. cheers