Since neither educational institution was able to certify you as being enrolled at least half-time, and even the two courses, if taken simultaneously, would probably not be a half-time course load, I don't think you can take a reasonable position as being a half-time student.
However, that only disqualifies you from taking the American Opportunity Tax Credit. You are still eligible for the Lifetime Learning Credit or the tuition and fees deduction.
For more information, click on either of the links above, or see IRS
Education Benefits Comparison Chart.
