The maximum a child can get under these facts is the $710. If the disability rate under Dad's account was higher, then they could get more, but after accounting for the overpayment, the figures sound correct. And, dad's rate is based on taxes he paid when he was able to work and earn money and pay taxes, and they do not usually mess up that number, so that is probably correct too.
The overpayment does not stop getting collected even when th money comes from a different SS numbered account - SSA wants it's money back no matter what.
Sorry, bu this sounds coorect. Best of luck to you.
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