AFF Supporters can remove this and all advertisements
Where did you see this?
Interestingly if you search Google for those flight numbers, the first hit is for the VA flight status page:
Flight information for QF8574/Today/plan | Flight Status | Virgin Australia Group of Airlines
Flight information for QF8566/Today | Flight Status | Virgin Australia Group of Airlines
Presumably it's some sort of QF positioning flight that DJ's website doesn't filter out.
If you do a route search for today, for flights from Perth to Sydney there are two QF flight numbers
QF8574
QF8566
Weird???