I emailed service center and three weeks later I received this response...
"Good afternoon,

Based on your request we researched the status of your cases. We are actively processing your cases. However, we have to perform additional review on the cases and this has caused a longer processing time. If you have not received a decision or other notice of action on the cases within 60 days from the date of this message, please contact us for updates.

The National Customer Service Center's toll free number is 1-800-375-5283 or you may access the USCIS website at www.uscis.gov should you have any further questions or need additional information

Regards,
USCIS Nebraska Service Center"