Not really helping me since the DEC 17 and FEB 12 dates in both contradict each other in that that they say they have started processing my application.These are correct information.
Dec 17- Acknowledgement of receipt from Sydney NS office where you mailed your docs- confirming your application is complete. Then they transfer your file to local visa office corresponding to your Home mailing address .
Feb 12- your local visa office opened your file and started the real process of verification required for citizenship.
Mar 9- Local visa office completed your BGC.
Hope it helps in understanding.
I mean that seems contradictory but hey, it's been a long day and I'm drinking beer.