Hello again,
It was 5.1 the audio and this is how i wanted to do it. As you can see in the screenshot that i posted i had 3 layers with audio in the first part, and 3 different layers with audio in the second part (made automaticly when i imported the videos). I just solved this by (quite simple actually...) dragndrop the 3 layers from the second part in the 3 layers from the first part.
Anyway, why it wouldnt render the layers as they were i didnt understand.

Regards,
George