Hi Rob
I've just spoken with David Grove of CAA/DAP/AUS who were responsible for issuing these. He's been in touch with AIS and they believe they have run the problem to ground.
It looks as though there is a problem in the format of the data being sent out by AUS resulting in the Lat/Long in the Q line being defaulted to the centre of the FIR.
I'll try and get some more info.