Are you referring to how they come into view? I’m also going to assume you got the pro version of Widgetkit? This one you should be able to get support from them or post it in their forum, but make sure you describe what is happening. Also, are you on WordPress 3.9 now? If so, I’ve seen many people using 3.9 experiencing odd random things and bugs being posted to their development team. I noticed that the Ken Burns effect of the widgetkit slideshow with the latest WP 3.9 does not work properly where it should be zooming in on each slide, it now stretches downward only. So this could be having an affect with the effects of your sliders.