We have set up CComment to send a notification of new comments (e-mail) to a selected usergroup (moderators) and also to the author of the article. (com_content).
Now when an article has been posted by a user that is in the moderator usergroup gets two notification e-mails: One because he/she is the author AND part of the moderator group.
At least that is what we think happens ;-) It's a bit hard to test in real live...
Can someone conform this and if this is indeed the case, maybe it would be a good added feature to prevent mails of a new comment being set more then once to a specific e-mail address?