Single Template displays all posts

Hi Everyone

I have a couple of blogs in WordPress that for any reason, single page displays all posts. I am using WPML, I don’t know if that might be the problem, because with default language everything works fine, but nou in others:

That’s default language:
http://www.pamias.com/wp/2011/09/pamias-participa-en-las-jornadas-innovacion-y-arquitectura-sostenible-barcelona-2009/

English version:
http://www.pamias.com/wp/en/2011/10/pamias-participates-in-the-project-management-barcelona-business-opportunities-2009-2011-health-hotel-public-sectors-conference-series/

Any idea what is causing that?
Thanks a lot