Hi Silke,
Yes, it sounds to me as a normal behaviour . As long as the module is published, it is indeed showing in the template somehow. Even if it's empty.
- Need help? Post the URL of the related page (eventualy as confidential info), it will help solve your issue faster.
- An error, notice or warning? report the exact message including the line number
- If you get a white page , enable error reporting and / or check your server error logs.