Why isn't this simple option available? This person explains the bug better than I can...
http://www.videoforums.co.uk/general-software-problems/21824-avs-video-editor-trouble-questions-please-help.html
Basically, I am trying to make a music video. I have the audio on a separate line, and every time I try to delete movie scenes or rearrange the scenes, the audio line is, too, tampered with. This is quite annoying and there's no work around I can think of. . . The audio line and music line are locked in, treated as one. Why can't the two lines be treated independently?