Home page - image slider doesnt work right

When I open another page in Google Chrome in another tab and return to tab where Your template is, there is a problem with image slider in home page.

When it loads another photo there are stripes and part left from the photo that was loaded before new one.

that happens probably because the actual site is loaded on demo page with iframe

So it will work,right?
Im interested in buying it?

Real link is:
demo.hotjoomlatemplates.com/cars/

you can check there.

Same thing again.
Thanks for a quick reply,Ill think about it some more becouse Im interested in another template - DesignNow.
I asked a question in topic for DesignNow template so I hope for a quick replay as well.