I am making a movie containing video clips and one audio track.  I have placed certain video clips at specific places in the movie to match up with the lyrics in the song. While the program is open, I watched several times to make sure that it matches up perfectly.  So, I click the save icon, watch it over and over, and it's perfect.  HOWEVER...when I save the movie to my computer, and watch the final product, the audio and video are not even close.  The song starts where it should, but does not match the video clips the same as when I watch it in preview mode.  VERY FRUSTRATED! I have tried saving 3 times, and nothing's changed.  How can I fix this?