Question about Groups and updated files

I'm guessing this is a form of version control, or at least is intended as a clue to the group members that the most recent version is on top and visible, and they need to click through in order to divulge the document's history.

You could download the document, alter it as needed, rename it, and then upload the newer version. That way the software won't think it's the same document and do its little version control/clue dance.