[Plugin: Slideshow Satellite] Thumbs appearing outside

hi there, just wondering if you knew why my gallery was doing this?

https://justwatchthefireworks.com/test/studiomayfield/showroom/

want the little preview thumbs to stay wrapped up in the gray area but they go outside of it. like the fifth one there.

is this my gallery slideshow plugin (premium version of satellite slideshow) or the theme css i should fix?

https://www.ads-software.com/extend/plugins/slideshow-satellite/