I am wondering why I didn't qualify for the EITC this year since the income threshold went up this year, I should have been able to qualify.

So I am just now finding out that the last year threshold was just over $56,000 and I had made $53,000 and I didn't get my EITC, and this year I made just over $57,000 and the threshold is just over that as well this year. Is there some other reason I wouldn't qualify? I have 2 school age children that are claimed as dependents.