Wiki Permissions

Project:ProjectPier
Version:0.8.8-stable
Component:User interface
Category:bug report
Priority:normal
Assigned:stevec0023
Status:new
Description

I have recently installed 0.8.8 with SP2 and both patches. I have also activated the Wiki plugin and started to add Wiki pages for projects.

However, I have noticed that when a Client User is logged in, they can Add & Edit wiki pages even though I have set their user permissions to be:
Can access wiki = true;
Can manage wiki = false;

It appears to me that the permissions for Accessing the Wiki is not controlling what the user can do. There seems to be no difference in what can be done by the user if they are given permission to only Access wiki pages. They continue to have the same access and control as they do if they are given permissions to Manage the wiki.

Is this just me experiencing this?
Is this supposed to be like this?
Can anyone guide me where to look to stop this so as users with Access to the Wiki but can not Manage the wiki can only view the wiki pages and make no changes to them?

Thanks in advance.