Why is my unspent HSA added as additional income

In order to correct this, after you enter your 1099-SA, you'll be asked in the interview if you spent the money on medical expenses. Answer "yes". Continue through the interview until you reach the page asking if you were covered by a high-deductible plan.  Here, indicate the period of time you were covered by an HSA.  

I went through those steps and answered correctly as you shown, but it did not correct the issue.  What else could it be?

You must complete the HSA contribution section to establish your eligibility to have made the HSA contribution.