Bucket Logic Rewrite

I created a website named [login to view URL] with one developer and expanded it with another. The purpose of the site is to grab videos from ustream and playback videos at certain designated time for certain length. The system worked perfectly with the first developer but did not transition well when I created the second element called buckets. Buckets- The purpose of the video buckets is to specify a certain type of video etc. Music video, Commercials, School play. And constantly grab videos from this section until the scheduled time was completed. The logic written by the second coder did get the system working to some extent, but it oddly made each video play twice for some reason. All though the first coder did not have time to complete the project, he looked at the code and made comments on how to fix the issue. That leads me to you. I need someone to grasp the code, follow the comments and rewrite the logic so the system works smoothly.