[Plugin: Carousel slideshow] Didn’t rotate correctly with 3 images; does with 5

I created a carousel with 3 images, but they didn’t rotate like the demo. When I clicked the left and right arrows, the images just slid to the left or right; they didn’t appear large and centered, but small and only on the sides.

Once I had 5 images, they rotated correctly.

http://wordpress.org/extend/plugins/wp-carouselslideshow/