Can you produce another video with the physics movement in place?
Can you provide a more detailed description of the problem that’s visible in the video, perhaps recording your voice while making the video describing the problem will help!.
Look at a project like the Sticker Knight demo: https://marketplace.coronalabs.com/asset/sticker-knight-platformer and study how it’s handling moving objects will help.
One of the reasons you don’t have a solid answer yet is that we really don’t understand what you want it to do, what you are observing it doing. Just looking at the video as is, doesn’t really show what the problem is and what the expectations are.
Rob