When Kenobi seemingly runs right back into the same area because of the faulty left/right relationship of the camera, it almost appears as a comedy sketch where he runs back into the scene “oopsies, forgot my lightsaber!”
OMG thanks for pointing this out. There were so many little moments like this that made me chuckle.
It did feel like they didn’t have much of a set built and thought they could just work with a few mounds of sand and add the rest in post. Like you said, though, some of these things can be fixed by something by as simple as flopping a shot.