Not able to list all available results when searching for objects

Dear group,

I'm continuously finding situations in OpenERP v6.0.1 where the search of a resource does not show the expected results.

For example, I'm logging to OpenERP web interface as administrator (meaning I have all access rights).

Example 1:
I would like to assign an extra role to a user. I go to Administration > Users > Users. I then select a user and press "Edit". I then press "Add" to the Access Groups section. I would expect OpenERP to list all access groups available in Adminstration > Users > Groups, but instead the system just lists the group "Administration / Configuration".

Example 2:
I would like to assign a user to a role. I go to Administration > Users > Roles. I then select a role and press "Edit". I then press "Add" to the "Users" section. The search pop-up screen just presents the user "Administrator". I cannot assign any other user.

Example 3:
I would like to add a user to an existing project. I go to Project > Project > Projects. I then select a project and press "Edit". I then press "Add" to the "Members" tab. The search pop-up screen just presents the user "Administrator". I cannot assign any other user.

I'm not sure if I'm missing something...

Regards,
Jordi Ballester
<email address hidden>