SU01 - User and Role Change Documents show conflicting information

We have an issue with our audit group.

In SU01 - the Display Change Document for Role Administration shows that a new role was created on 9/4/08.

In SU01 - the Change Documents for Users shows that the profile for the new role was added to a user on 8/21/08, which is prior to the role being created.

How could this happen? Any ideas?

Thanks!