Movie Maker won’t convert first clip of movie

I uploaded a video that I recorded of myself, and then edited it quite a bit, cutting several scenes. I had also recorded the audio to it on another device, and uploaded that too. I had it all edited so the audio and video matched. When I play the video in Movie Maker format, it is absolutely perfect. But when I went to convert it, it completely deleted the first video clip of the movie, while leaving the audio intact, so when I spoke in the video it didn't match the audio. Then I noticed in the converted video that there were some scenes that I had deleted from the original video, that weren't even in the completed Movie Maker video. I've spent hours on this and tried everything I can think of to fix it, but I'm getting really frustrated, and thinking about using another video creator for this movie, but I hate to do that given the time and energy I have in this one.