If HOH with $9000 in child care expenses, 1 qual. child, Turbo Tax is listing my dep. care credit as $3250, when I think I should get the full $4000 (50% of $8k)?

This is regarding Dependent Care Credit, no the Child Tax Credit. My income is definitely under $125k, and expenses up to $8k are eligible. I entered all my care expenses which total a little over $9000. I am not sure why I am not receiving the maximum credit ($4000) for 2021, since the expense limit went up. I have 2 dependents, but only one is under 13. Turbo Tax is only showing $3250 as my credit for 2021.