bug in the_permalink function

Hello,
on my website in categories is now visible all category structure in links to articles.

The link looks like this

http://forbino.com/binarni-opce/brokeri/stockpair-recenze/
but it should be this

http://forbino.com/binarni-opce/stockpair-recenze/ (without the subcategory url – in this case without “brokeri”)

I thought that was a bug of WP update but now I don´t think so. My test version works just fine and the versions of WP are the same.

Check this out, please
http://test.forbino.com/binarni-opce/brokeri/
http://forbino.com/binarni-opce/brokeri/

Do you have any idea where could be a problem? Thanks for all help.