setfacl -m d:g:groupname:rwx -R path/foldernamed means default: modifying the default ACL all of newly created files and directories will inherit this setting.
Modify the permissions of existing files and directories only [no default]
setfacl -m g:groupname:rwx foldername
Important notes regarding files: Files can't have default ACL because they can't have child objects. n access ACL for an individual file can override it. If a file has a special ACL that conflicts the inherited ACL, the file ACL wins: owerwrites the inherited one.
Clearing an ACL:
setfacl -x u:johny /path/folder