Hi Richard,
Regarding the Manager role in 2.0. What happened was, in Moodle 1.9 there was no manager role. In Totara 1.1 (based on Moodle 1.9) we added a 'manager' role to represent a staff member's manager. Then in Moodle 2.0 they added a 'manager' role which meant a user who was managing the site (e.g an administrator).
Because this would have led to conflict issues we renamed our role (old shortname: manager, old name: Manager) to "Staff Manager" (new shortname: staffmanager). We also changed the description of the moodle 'manager' role to "Site Manager", while keeping its shortname 'manager' as that is used in lots of places in Moodle.
When you assign someone as the manager in Totara 2+ we automatically assign the "Staff manager" role in the context of the staff member.
Hope that helps,
Simon