A website should also work when JavaScript is switched off, e. g. with the NoScript extension, as JS can be a security problem. On the example live site this theme makes all 3 banners visible at the same time, so they are misplaced.

This should be easy to fix by making all but the 1st banners invisible with CSS, maybe in a noscript section.

As I haven’t installed this theme and I refer to the example site, I just assumed the newest version in this report.