New Show - defaults -Show Artnet output default settings.

Hi,
Simple question here.
If I start a new show on Hog 4 PC and patch a single desk channel to DMX 1,Universe 1,DP1
I then go to the art-net output of the DMX processor why are the first three art-net universes not by default
outputting.
They are greyed out and need to be set to broadcast and the subnet/universe allocation has to be changed.
Is this something to do with the Hedgehog or nano consoles?