Deployment content copied to hosts in JBoss domain which do not use it

Issue

• We have discovered that the application deployed in a JBoss domain are being duplicated in the data\content folder of every JBoss Host controller in the domain. Each of the JBoss servers exists in its own server group.
• Deployment Content Filtering - Domain Mode
• After assigning a deployment file to a server-group, the content is copied to all Hosts (even to a Host that does not have servers configured to this server-group)
• Deployment in domain mode fails if "other" slave server disk full.What could be the cause of the issue?
• Why is the DC trying every host even though I am deploying to a server group?
• Why a deployment is stored on a HostController where it is not needed as there is no server for this deployment?