American opportunity credit on Form 8863 line 23

I am concerned that on line 23 of Form 8863 it says: Has the American Opportunity Credit been claimed in the past 4 years.   The forms says No.   But we have taken the Credit before in 2013.  It does verify that information on the Student Info Worksheet.  It says How many times has the student taken the Credit before on line 8 of the worksheet... it does say 1.  Why is there a conflict in this information on Turbo Tax?  And should I be concerned?