I was using a mooring overnight at Kitchen Point 2 nights ago. There are 4 moorings there - two if them close to the shore and two a bit further away.
We (bali 4.3) and a trimaran were using the two moorings closest to the shore.
During the night both boats came dangerously close and the conclusion was one of the mooring was slightly drifting. Luckily the trimaran knew when the other moorings were and was able to change it in the middle of the night.
All ended up well but we things could easily go wrong.
So be aware of moorings on Kitchen Point and ant other place

Since these are National Park moorings, I don't believe you are suppose to overnight on them.


"Please note that in virtually all of the areas where the National Parks Trust moorings are found, the areas can encounter rough and unpredictable seas. In addition, some buoys are in the vicinity of shallow rocks and reefs. The moorings are, therefore, for DAY USE only, and it is illegal to use them overnight."

They are day use moorings only not intended for overnight use. I doubt the mooring shifted since the are on screwpins into the bottom. They can only fail not drag. More than likely you got backwinded or a current shift. With a normal wind the one ball will be almost at the stern of a boat on the Eastern ball if no boat is on it. The anchorage there is not protected enough for overnight use regardless of the type mooring.
G