Sideshow Positioning Issue

I am having problems with the slideshow jumping to the right on some pages. I have the same two sideshows appearing in the sidebar of several pages of the same site. On some pages the position of the slideshows are fine e.g. http://www.bertsmaintenance.co.uk/ and on other pages it is positioned about 40px to the right e.g. http://www.bertsmaintenance.co.uk/edinburgh-gutter-cleaning/.

I’d be grateful for any help.

https://wordpress.org/plugins/simple-slideshow-manager/