Please refer the video:
http://screencast-o-matic.com/watch/cDQulGjZlz
This video is around 2 minutes long and I stayed on your homepage but I am unable to see your slide disappear.
Yes, if you stay longer, you should see that it will disappear after a while. How else would I have taken the screenshot?
I am not able to see this on your website.
You can refer the revolution slider's documentation for showing single slide.