AnnoyedVideoMaker

So I'm working on a video edit. For some reason this one part is giving me trouble no matter what I do. I have the image set to move via motion. It moves and it looks fine in the preview window. But whenever I export the video, the image moves and then flashes back to where it started for a brief second! Why is it doing this? No matter what I change it's still doing it. I'm going crazy!