I-485 Interview at Newark Local Office - Please help

[misrasum]

My wife and I were asked to come for an I-485 interview at the Newark local office on March 28th, 2007. The officer basically said he was going to approve our greencards. All he said we needed to do is get our fingerprints done and send him 2 passport size photographs each along with fingerprint receipt. We went immediately to Hackensack fingerprinting office (he gave us fingerprinting appointment letter for the same day). He also gave us a self addressed envelope to mail the fingerprint receipt and photos. We mailed him receipt plus photos the same day.
He also took our I-94 card away and said we would get a letter in the mail stating our Greencard is approved.

Now what I cant understand is:

1. My priority Date is 9/22/02 EB-3 (I am from India and my wife is from Poland - cross chargeability). How could the officer say he was approving I-485 when worldwide priority date is 08/02?
2. He said we would get a letter in the mail stating what we should do if we wanted to travel abroad. (basically to come into the local office to get our passports stamped) Is this usual procedure?
3. Now we have a child who was born outside US. We could not apply for I-485 for her because priority date is not current. I know we must file immediately before greencard comes or else we will be in trouble. What can we do?

Advice appreciated.