Child Care Tax Credit

Why is Turbo Tax saying "Because you entered $6,000 or less of earned income for both (me and my spouse), we need to know if either of you were a full time student or disabled, in order to calculate the maximum credit? Our income is much higher than that, and we both earned. As it is, I answered no to both questions (not students, not disabled). The credit calculating is over $600 less than was calculated last year. What is happening?