Hi,
The ACL inheritance feature allows documents to be inherited ACL permissions of main category (Edit, Delete, Download..etc).
You can re-build ACL for Edocman categories and documents by running 2 below links:
http://your_domain/administrator/index.php?option=com_edocman&task=rebuild_categories
and
http://your_domain/administrator/index.php?option=com_edocman&task=rebuild_documents
Then, ACL of categories and documents will be rebuilt based on your setting.
Thanks
Dam