How to get just one?

[joe at actionline.com]

It seems that I am beginning to get two copies of most recent plug emails.

Is this likely to continue or is there some change one should make to get
just one of each?

To: plug-discuss at lists.phxlinux.org
Cc: plug-discuss at phxlinux.org

Also, this email is addressed to: plug-discuss at lists.phxlinux.org
Should this be changed to: plug-discuss at phxlinux.org