[Plugin: Content Slider by SlideDeck] Problems on iPhone/iPad

In december I added this plugin on http://www.fotovanjouwhuisdier.nl/prijzen and http://www.perfectportret.nl/prijzen. It did work properly on my iPad and iPhone and it still does at the first one, but on the last one it suddenly acts weird.

I don’t think I changed something that caused that problem, but it couldn’t be just out of the sudden. But I don’t know what it is. Anyone?

http://ww.wp.xz.cn/extend/plugins/slidedeck-lite-for-wordpress/