What is supposed to happen to messages in Spam when you click "Not Spam"?

A message arrived today in my group (GroupManagersForum) in the Spam list, rather than the Messages tab under Pending Approvals in the Management menu. I'm not sure why that message was flagged as Spam, but that's not really my question.

I opened the message, took the screen shot I've attached here, then went back to the list and clicked on the checkmark icon (with the "Not Spam" tool tip) and the message disappeared from the Spam list. That I expected. However the message has not appeared in GMF's Pending list, nor has it posted to the group. What was supposed to happen?

I've opened a customer care report, [Incident:131207-002052], to see if someone can retrieve the message, or if I have to go back to the member and ask if they can resend it. But my question here is, What was supposed to happen?

You'll note the mark-ups in my screen shot. I had originally intended to post this in the Feedback forum as an "Enhancement or New feature request", but then I found this item which asks that we post further questions on this topic here instead.

https://yahoo.uservoice.com/forums/209451-us-group...