The AA should have replied to you directly...
Two more grounds for second appeal:
1. No reply to you directly.
Normal office procedures do not apply for RTI Act
2. When you do get the reply, just check as to who has signed it.
If PIO or AA have not signed it, then it is second ground for second appeal.
Better to wait and see what does the letter contain.
The letter sent to you was just for your information and said ".....sent our reply to the IT Department of 3rd October 2007. We hope IT Department will be contacting you in this regard.” If you have time, better to wait for this letter from the IT department.