A child that is a dependent of their parent has W2 income of $1,393 and unearned income of $1,000

This should result in zero tax because a dependent child is allowed $1,150 of unearned income tax free. The program is coming up with a tax of $61 and I believe that is wrong. It seems to me that it is not taking out the $1,150 that should be tax free. I just spent 1 hour 40 minutes on the phone with tech support and they say the program is working correctly. If the program is working correctly, why is there a tax?