Headlines!

I've search in the css but I cant find where to solve the headers in the checkout... They are several px to the right...

Is that a template issue or... When I look at your demo it seems fine!

See my picture: image missing http://www.hikashop.com/media/kunena/attachments/legacy/images/Shop_1.jpg

That's indeed because of your template's CSS.
You should add the CSS:
th{ text-align:left !important;}

in order to force the tables headers to the left.