the 4 to 6 month processing time starts after your bios. so it's only been 78 working days since october 1st. USCIS doesnt work on the weekends or holidays.
the RFE was probably a computer error, sad to say.
__________________
Date Sent 09/18/2012 Date Received 09/21/12
Date of Biometrics: October 24, 2012
2nd RFE update: 03/18/13 Received: 03/21/13
(asking for BC, 07 residency & HS transcript)
Date of Approval: 07/09/13 Date EAD Received: 07/13/13