Two of my recent flags were marked as invalid, but I have no idea why. The first one was a duplicate post, only 4 questions below, and was not only closed, but deleted. I flagged it as "Dual post, probably better on another site." Apparently, they agreed, but still invalid?
The newer one was clearly a shopping question, and was subsequently closed. I flagged it as "Shopping question".
Are we NOT allowed to flag. Is there some mysterious line between voting to close and flagging? If you guys close it, it should not be invalid because we were clearly right. It is very arbitrary.