It should not be possible for a team to subscribe to a mailing list. Teams don't have active account status so even if that were possible, they should never be able to receive mailing list postings.
However, I don't quite understand the bug report. Are you saying that the duplicate message is a mailing list post from a person, or a message generated by Launchpad in response to some event?
It should not be possible for a team to subscribe to a mailing list. Teams don't have active account status so even if that were possible, they should never be able to receive mailing list postings.
However, I don't quite understand the bug report. Are you saying that the duplicate message is a mailing list post from a person, or a message generated by Launchpad in response to some event?