I wonder why unregistered users like me are trying to press the comment button while commenting but refreshed the page or redirected to some login page as a result. It sounds like the ability to comment for unregistered ones is disabled.
Try to log out and figure it out. I just watched the recent activity of CCSW, there were no comments made from anons/IPs over the last few days, either in articles or their message walls. I wonder why the issue was there?