回複：回複：Call CIS. Tell Rep that your EAD card should be 2 year val

I had the same situation and just called USCIS. I was told to file a new application along with the original EAD card, and write a letter to explain this is an error (suppose to be 2 years instead of 1 year).

Here is the link to the press release of the two year EAD rule:

http://www.uscis.gov/files/article/employ_auth_docs_061208.pdf