I've seen this topic on a couple of posts in this forum, but I wasn't able to fix my issue. Both the registration and login page have duplicate forms. They aren't in separate content areas, nor is there a second instance of the loop anywhere. Because they appear immediately one after the other within the same div, the CSS solution mentioned here doesn't work either.
Is there any other explanation for the duplicated forms? You can see the offending page here: http://cinepax.com/log-in/.