post per slide not working

Yes, I checked your slider with firebug and got every slider has only one image. Post per Slide is work well.You can check my demo pages for template two. I checked it with different version. Could you check your options and using right optionset id at shortcode? Make sure you are using the same optionset id for shortcode which you are changing.

If you still have problem request a contact with your email from my site.