doubled post – last post on every page

Hi,

I’m new here and like to ask for your support. I already looked through all previous posts couldn’t find an answer to my problem.

Description: Looking on which ever post the last added post is shown before the choosen post. It’s difficult to describe so please find here the link. The post “Donaukanal_Wien” is choosen but the post “Ebro Stausee” (Which is the last added post) is shown before the post “Donaukanal_Wien”:

http://fischradar.com/oesterreich/donaukanal_wien

It would be great if anybody has an idea how to solve!

kind regards,

Christoph