Movie Maker preview and published videos are different

Hello Windows Users! I have been making a memorial video for a deceased family member, and movie maker is not working well for me. When I watch the video in the small preview screen that is embedded into the storyline, it shows one timing, and then when I expand the video into the full-screen preview, it shows a completely different timing. Then, when I publish the video, it shows a THIRD different timing. By timing, I mean the time the clips change over. I'm trying to match them up to a song so that they change based on the words being sung. Obviously, this issue is making my life difficult, since I can't properly time the clips to the music if I can't have an accurate representation of what the video will be. Does anyone have any idea how I can fix this so I can properly time my clips for the finished copy?