Day,
Yahoo has made a lot of changes lately that we have no control over. I highly suspect that this is a result of those changes. Usually these things eventually get worked out but in the meantime, I suggest you do what I recommended in my other post in terms of getting the individual emails you want to keep.

By the way I'm sure I'm stating the obvious when I say that when "forwarding" emails from the group, please only forward them to yourself.

Thanks
Kitty