Dlib Face Identify

Hi all, has anyone successfully used dlib face identify component to recognize persons? I have this in configuration.yaml:
Screenshot%20from%202019-01-29%2017-23-11

But it always return both persons even when only one person should have been detected:
{
“faces”: [
{
“name”: “Norman”,
“entity_id”: “image_processing.dlib_face_vivotek”
},
{
“name”: “Jack”,
“entity_id”: “image_processing.dlib_face_vivotek”
}
],
“total_faces”: 1,
“friendly_name”: “Dlib Face vivotek”,
“device_class”: “face”
}