Really meant the NC was passed. Many of my friends, including me, got the the same kind of fingerprint taken in that period. Now many of us have got I-485 approved, some even got the real GC.
You do not need to worry. Me
PD: OCT/04
140 AD: Jan/05
485 FD: Mar/05 (I did not anticipate 140 approve that fast so that I filed 485 late)
485 AD Sep/07 (no real GC received yet)
Ejnjoy your life today, forget tomorrow!