[Samba] ACL and Replace all Child object permissions

[Zorg]

I have an issue with samba+acl and Windows checkbox "Replace all Child 
object permissions"  .

I have a folder with defaults ACLs :

/default:user:user1:rwx,
default:user:user2:rwx
owned by user1/

On Windows if I'm checking "Replace all Child object permissions with 
inheritable permissions from this object" on this folder, it losts the 
default ACL default:user:user1:rwx, others ACLs stays right 
(default:user:user2:rwx).

/default:user:user2:rwx
owned by user1/

Is it a normal behavior to delete an user from Default ACL if he is 
already owner of a folder?
How can i avoid this?


Thanks