Duration in animation issue

[hyunchris]

I am trying to have an image move from off screen right to off screen left. However, I am unable to get the animation to repeat immediately after it is offscreen. I set it to "immediately" and then set the duration of the animation to 12 seconds. The image will scroll and then after 6 seconds it will be completely off screen, another 6 seconds will pass until it starts the animation again. If I set it to 6 seconds, it scrolls too fast and again, half of the duration the screen does not have the image. It seems the duration input actually includes a delay, which is half of the inputted duration.

I have played with all the ease settings, but cannot find a way to fix this. Any ideas would be appreciated