Can someone tell me what I am doing wrong. Occassionally when I am building a timeline each file I add to the timeline duplicates and is added to the timeline at some point further down the timeline. IF ,,,, I don't recognize that this is happening, the video renders to the end with a large black middle portion, then the duplicates of the original video... Recently, my 2 minute 38 second movie became a 12 minute movie with about 9 minutes of black frames ,,,, What is causing the files to duplicate and be added to the timeline?