How did I get so many users in Server?

I recently installed OS X server 4.1. All seemed to be running smoothly. When I came in the next day I had 89 users. All appear to be file names and services. This happened before on server 2.2 before I upgraded. It happened overnight so I am not sure what was done or how it happened. Screen shot attached for clarification.

Tried searching but haven't had any luck since I am not sure how to describe it.

Thanks,

Donnie