The prime issue that they do not seem have abided with the conditions of travel.
So far they have eaten in two dining facilities in Victoria, and it would seem have also used two shower facilities, both of which is not allowed.
You might recall the truck driver linked to the Butcher Club Cluster who drove to Kilmore (allowed) but who then dined in the cafe (not allowed) where he infected people. He also did not reveal all of the exposure sites at once including visiting Shepparton. In this case the Kalkallo site has been added at least a day later than it should have been. And more like days late on all sites as the information flow has been very slow as the removalists have not been that forthcoming about their movements.