Slides not displaying correctly

Using Naturalife WP theme with Revolution Slider (from Envato Market).
On the home page, I duplicated the first slide to create 3 new slides. The first slide appears correctly. However, the following 3 slides all display together, one on top of another, rather than as 3 separate slides. How do I correct that?

The page I need help with: [log in to see the link]