If the Conflict Report lists "Not one of X's preferred services", this is likely because of a setting in their volunteer profile. When a service preference has the "only as..." after it, this tells the program two things:
- the volunteer should only be scheduled in that ministry at that time, and
- the volunteer should not be scheduled in that ministry at any other time.
To fix this, go to X's profile and double-click on the "[service] only as [ministry]" preference, and un-check the "only as" option. Click OK and you will then be able to place her at another service in that ministry with no problem.