Quote Originally Posted by noparking View Post
2. My understanding is that pointing the meter from the position of the camera at the subject is reflective; pointing the meter from the position of the subject back at the camera is incident
Pointing the meter from the position of the camera at the subject with the dome off is reflective; pointing the meter from the position of the subject back at the camera with the dome in front of the cell is incident.

Your exposure problems might be due to the incorrect usage of the dome.