Deductions & credits

Did you complete your taxes or try somewhere else?? I'm not understanding what is going on either... I have a 15 & 16 yr old sons that I have claimed since birth,  from my understanding I should receive 6000 CTC.. ? I recieved the advance of 3000, so shouldn't I get the other half , 3000???  Am I wrong? Anyone ever find a answer with this??!!