wrong logo image path

Hi,
my new logo images gets uploaded but are not shown.
The generated html code says:
http://mysite/wp-uploads/2012/06/cropped-logo2.jpg

but it has to be:
http://mysite/wordpress/wp-uploads/mysite/2012/06/cropped-logo2.jpg

Funny enough the standard image gets linked correctly:
http://mysite/wordpress/wp-content/themes/responsive/images/default-logo.png

I use a different Site Address than WordPress Address to make wordpress my starting page. But that doesn’t seem to be the issue.
I tried 3 different themes (twenty eleven, responsive..), all had the same problem.
It works with squirrel theme, where I can correct the path in the editor.

So why does the site url and the wordpress subdirectory not get correctly inserted in the image path?
Need some help here.