Different resource rates seen by different users

I have just discovered something weird and am really hoping that someone has found this before and can sort me out.

There is a difference between rates assigned to a resource when viewed by the administrator and seperate users.
The difference in around $20 an hour.

Why is this happening at all, we are all on the same data base.

If the rates are adjusted by the admin, they are escalated for the user and if set by the user they are deescalated for the admin.

Help please

Andy