Hello.
Contact USCIS at 1 800-375-5283 to explain the error or schedule online an INFO Pass appointment to speak in person to a USCIS officer. They should be able to correct the error on the visa.
If you are unsuccessful please contact me for a free consultation and I will advise on the next step for your particular case.
Best of luck.
Answered on Feb 10th, 2016 at 1:51 PM