People only mode for wired stick up cam

It seems like the only thing people only mode does on the wired stick up cams is set the motion sensitivity setting to a reduced level that can't be changed. On my battery powered stick up cam, I get a notification that says “person detected” when a person walks by in people only mode. However, on my wired stick up cam in people only mode, I just seem to get the usual “motion detected” notifications, whether or not there is a person. It seems like people only mode should actually look for people on the wired stick up cam, but all it seems to do is fix the motion sensitivity to a lower setting. Does anyone else have the same experience?