ghost image in lux renderer

blue6string

I rendered in lux via reality 4 a image. and while the image was still rendering I kept the same camera positioning then adjusted the pose to something better. Then I when rendered I didn't change the file name... so lux is rendering to different images to the same file...

What i notice is that the second image has ghost images.... is this normal? The first imagined is continuing to render but does not show the second image of the adjusted. this would a new effect to use to convey movement.