Hi I'm having some trouble setting up a Kareha image board

http://img.gig4free.com/kareha.pl

One problem is that one thread will have a url like

http://img.gig4free.com/kareha.pl/1160013863/

and the second will be

http://img.gig4free.com/kareha.pl/1160013863//1160014721/

and the third will be

http://img.gig4free.com/kareha.pl/1160013863//1160014721//1160015427/

etc

Everything appears to work correctly, permissions etc but is this because the subdomain is trying to add banner ads to the page so it concatenates the thread reply numbers?

Any help is appreciated thanks.