To answer anyone's questions who's cases got transferred, for example... If your case was at Vermont service center then got transferred to Nebraska service center, then it would be Nebraska service center who approved your last EAD Card.
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Initial DACA Applicant-Date delivered: 9/04/2014 (Nebraska Service Center) Biometric Walk-In: 9/26/2014 Case transferred to (California Service Center): 10/?/2014
I-821D (12/18/2014 APPROVED!!!)/I-765 (12/18/2014 APPROVED!!!) Approval Letters received (12/23/2014) EAD Card received (12/29/2014)