Supervisor can't approve employees timesheets

This module looks like it does exactly what I'm looking for, however I've spent all afternoon trying to get this to work and not had much luck.

I've done a clean install of Drupal 6.20 and firstly installed timesaver-6.x-1.0-rc3 with listkeeper-6.x-1.0-rc3 and the PHPExcel files following your instructions. Then I tried upgrading to timesaver-6.x-1.x-dev

I've had the same issues in both set ups and I don't have any other modules installed.

The issues I'm getting that a user who is set up in listkeeper as a supervisor cannot actually see any of his employees unless he is given the permission "administer Timesaver" and when given that permission he sees every user in the system whether or not he is set up as their supervisor.

I've also noticed that the lock on the timesheets isn't working - it says "please wait", then looks like it has worked, however when you go "Timesheet home" and then back to Approval it isn't locked, i.e. the lock check box is cleared.

Really hope you can help.

Thanks
Paul