I recently got sentri w/GE I was warned I would get an X a few times because of a juvenile arrest 20 years ago.
At customs today I just said juvenile arrest 20 years ago as I knew what was causing he issue. The agent laughed and said no problem, signed my GE receipt and I was GTG.
They were very nice and said the system just needs to update and it takes a while.
That being said I just flew PVR-OAK-SAN oakland had 3 international flights arrive at once with 1 customs line open. Loved having GE, huge difference. I previously only had TSA PRE.