He is using ACP's auto-calibration feature via an ACP Plan #CALIBRATE or by the Auto Calibrate option in Scheduler ImageSets, and ACP's option to save the original uncalibrated images is turned on. Here's a map to that information:

Snap3.png


If you turn this off he will not be able to get his uncalibrated data. That might be a problem if he is doing science imaging.