Administrators are the people who have total control over the system. Yes, they can even screw up the project. In principle, these accounts shouldn't be used except for administrative functions. Theses might include creating new projects, assigning managers to projects, or making system changes. User discovers what he considers a bug.
User returns to the product webpage to see if there is a fix or workaround.
User sees that there is a public bugtracker and goes to see if his bug is listed there. User doesn't find it and so reports it. Updater comes by and notices a NEW bug and reads it. Developer is notified and discovers he needs more information. User recieves an email requesting more information and returns to give it.