Wondering what the heck they could need, I thought my packet was spot on =(

[COLOR="rgb(255, 0, 255)"]Initial Applicant[/color]
Date Application Sent - September 2, 2014
The Lockbox the application was sent to - PHX
Mailing Method (Express, priority, certified) etc. - Certified Mail
Date acceptance letter of application received - By Email Received and Routed to Nebraska September 8, 2014
Received By Nebraska- letter sent September 9,2014
Date Biometrics scheduled - October 6,2014 went on appointment date
November 25th, 2014 Case was received at my local office (USCIS online Update)
December 11, 2014 My name was updated on I-821D (USCIS online update)
December 18th, 2014 Request for Evidence (USCIS online update) will receive by mail... Pending