What is your priority date and country of chargeability? If you are not expected to be retrogressed for too long, then USCIS will only issue a 1-year EAD. This is their standard practice. 2-year EADs are only issued to applicants who are expected to be retrogressed for a long time.
Adjustment of Status: EB-2 (NIW) at NSC
Package RD:2/26/07 | FP1: 3/31/07 | FP2: 7/24/08
I-140 AD 6/24/08 no RFE
I-485 AD 9/25/08 no RFE
If you use the word "issue" instead of the word "problem", I am much less likely to respond to you. I am also somewhat less likely to respond if you use the word "back" instead of "ago", or if you use the word "back" immediately after the word "return".