A couple of data points today. I was checking in at ORD for my flight to LGA as I received a call from AA telling me my flight was delayed. Agent put me on standby for earlier flight. She mentioned that I was not cleared for Pre-Check but she resubmitted my name and I was cleared. Same day, I'm checking in for a flight from JFK to SFO and I ask the agent if I was cleared for Pre-Check; she responded that she could not tell ( I was). So is it a difference in training, stories or software?