So you have a multiple articles on a page and in those articles you'ev used a couple of slideshows....and like magic one photo set is displaying the photo's from a set defined in a different article... Doesn't sound like the behaviour you'd expected, right?

It has something to do with the plugin not remembering the ID counter that should give every slideshow an unique ID. This is an issue known to us and we plan to fix it in version v0.6.