I pulled the below quote from Dive-oz.
Here is the official response from the Ranger in Charge of Marine Parks Operations - Moreton Bay
Dear Mr. Parker
In recognition of the increasing demand for public moorings in Flinders Reef no anchoring area, the Queensland Parks and Wildlife Service (QPWS) arranged for the construction, installation and load testing of eleven new moorings at the site. Unfortunately, the contractor failed to supply a successful load test following installation. Moorings are load tested and assigned a class (A, B, C or D) that determines the size of vessel that can safely tie up to the mooring under certain operating conditions. It is essential therefore that the mooring loads are assessed correctly. Flinders Reef is located in exposed offshore waters and a mooring failure could lead to a significant marine incident. As a consequence, in the interest of public safety, the mooring tackle was removed last year while alternative arrangements were made to have the moorings re-tested.
Prolonged rough sea conditions have hindered the new contractors ability to load test the moorings, however, I am advised that recent advice from the contractor indicates that tackle can be re-instated for Class A and B moorings. These moorings will facilitate access for most vessels and QPWS intends to connect this tackle to the mooring blocks as soon as weather and sea conditions are suitable. Load testing by the contractors will be undertaken as soon as physically possible.
If you have any further concerns please dont hesitate to contact me.
Kind Regards,
Jody
They have had a few discussions about the moorings. I think I remember reading that the original ones either weren't tested at all, or had failed recent load testing and were therefore removed. It seems that one of the operators did place some new moorings, but DERM removed them fairly quickly because they were 'unofficial' and were also not rated. Jason form Dive Dive Dive was involved I think so a call to him would probably give a clearer idea of what went on.