Sometimes I don't think it hurts for articles to be reposted. People who have joined since the previous posting might not find the original post and maybe others would like to read it again.
It is not a bad thing at alI. I think it is a good thing to have studies recirculating. Studies are studies. They are good articles. I just think it is good to have an idea of what has already been posted on the Forums. I have been meaning to research some of my PDF collection and those are mostly older studies.