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Marla started a discussion years ago. I started a group "Have You Ever Heard Of..." about two years ago." Out of respect for her, I didn't delete her post. I probably should have by now. Maybe I will.
If someone sends out an email blast, then his/her inquiry is only in the email blast. If you go to the group "Have you ever heard of..." she may have left a comment there too, not sure. But if she hits on "Send message to the group" then that's what it is, an email blast to the group. That's why you don't see the same message in the group.