Xiaobaitu and other experts, please help on receipt notice and f

Our 485 checks were cashed on June 12 in NSC. Both my son and I got the receipts and finger print notice. But I have not got my wife's receipt yet. Is that normal ? Meanwhile, my son is only 9 years old. To my understanding he does not need to do finger print and actually I did not inculde the money for his finger print in his 485 application. Could xiaobaitu or anyone tell me what should I do ? Thanks.