Hi. You're correct, we have two cases running concurrent. The son's case was DQ about two weeks afterwards since they asked about my US residence (since I live in the Philippines). My wife's case went right through without any additional asks.
I'm guessing they go from my wife's DQ date though? Or are there two separate interviews, two separate medical exams, two separate biometrics, etc? The son is turning 14 in a few weeks.