Can someone please help me with the member moderation queue?

I have member moderation set up on a board I run, and for some reason some of the moderators on the board are getting new user notification emails. I was of the understanding that only the 'board email address' (set up in the Primary Settings | General tab) should receive these notifications.

1) Is my understanding of this wrong?

2) If so, is there a way around having moderators get these notifications?

3) If not, what is happening here to cause this?

Thanks,
Tracy Friesen