Group Wikis not respecting set permissions - OS X Server 10.5.6

I have an x serve running 10.5.6 and the web service enabled and working with 2 wikis.
2 Groups both with wikis up and running.
I recently discovered that one of the members from Group A (wiki A) can access the wiki B site.
This is a big problem that I am trying to resolve.
I know the 1st thing logically would be to update to the latest release...but this isn't an option currently, and I want to explore other less disruptive alternatives first.
I wondered if anyone has come across something like this ?
I have tried creating a realm for the wiki folder in question with no sucess..
recreating the offending group (the one that has access when it should) isn't really an option either as has 100 members or so.

Hi,
This may have some relevance on the access side
http://discussions.apple.com/thread.jspa?messageID=9593883&#9593883
Note that two wikis on the same host can be accessed by their group name. But that doesn't allow any more than getting a login popup if the access priviledges are correctly assigned.
Each wiki is assigned to a group and its membership determines who gets access. Along with group membership additional access settings can be set in WGM but more detailed if you use Directory.app by selecting a specific group.
If the setting is for Access to all authorized users then that applies to all users in Open Directory. A more specific setting is required to limit access to group members only.
Additionally the setting of Viewable to all authorized users allows any members in the directory to see wiki content but not add or modify content. They will be allowed to make comments.
If a wiki is to be closed to all except group members then access is select for group members only. With this setting only group members can get passed the login prompt.
This is not exhaustive of all the possibilities but does demonstrate a range of control. The wiki access controls are not as fine grained as ACLs but can be used effectively.
It is eye opening to realize that an authorized user includes any one that can login to the directory.
HTH,
Harry

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