Slider Doesn't Slide

I have created a slide and have put some content in. A review from an ex tango student. However when I copy of the slide it does not slide. I created another slide and placed the comment of another student. Now the slide functions but it moves both slides together instead of separately. I have tried various remedies but to no avail.

Hello @zentango

Please provide more information about the issue, screenshots and your read only link help the community to better understand your issue.