Frances,
I thought if another moderator clicks on a message to be moderated, it marks it claimed. You can¡¯t moderate it.
If the moderator clicks Edit is it "claimed", even if the moderator then cancels out. Sharon should have received the bounce back of her approval in that case, and should see those messages as "claimed" on the web site. Neither of those being mentioned, I'm not sure what could cause what she's seeing.
Note that on the web site the "claim" is only advisory, other moderators can still approve or reject the message. This is not a bug, it is that way so that the message doesn't get (semi-) permanently stuck if the claiming moderator doesn't finish with the message.
Shal
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