I’m an ap at both. At Disneyland I’ve always had the exact same experience. At Disney world, I was confused multiple times just this week. One park I was told not to line up for the metal detector unless I was told to, next park I was scolded for trying to go around the metal detector when no one told me to go through (I was following the previous parks orders), most parks I was told nothing and just joined the line at the detector.
Yesterday at studios was an excellent experience, things were explained very well. So it can work, but it’s extremely inconsistent.