Looking at the source code of that url, you can see that you did not load the style sheet in the index.php.file:
In this index.php file the stylesheet is properly loaded:
The good news is that there is nothing "wrong" with your domain, and there is no need to wait - just correct the html in the kat-tunsix.net index.php file so that it loads the stylesheet - have it be the same as in the ryuuko.net index.php file, and you will be fine
edit: Oops! bjornl beat me to it , sorry for the needlessly repetitive post.