now I realized another problem but I'm not sure, if it's a bug or a feature.

The admin user is able to change the order of content parts in an article. But the ordinary editor isn't able to change the order.
How can I enable this (important) function to the editor?
Additionally the editor cannot change the order of the articles itself also. In the site structure all levels have "ordering of assigned articles" set to "manually" and I also tried the option "$template_default["article_order"] = 1;" in the conf.template_default.inc.php file, but both didn't worked.
(By the way: what is this option in the conf.template_default.inc file for?)
Thanks for any help,
Dennis