Resource Non-labor costs not calculating correctly

  I have a cost-loaded schedule where the resource is simply a non-labor Lump Sum. When I update the non-labor cost percent complete up to 99% everything works perfectly. When I enter an actual finish date, the Actual Nonlabor Cost, Actual This Period Nonlabor Cost, and the At Completion Nonlabor Cost all go to zero. The Budgeted Nonlabor Cost is the only amount left. If I type the amount of the budgeted non-labor cost in the Actual This Period Cost, the costs re-populate correctly in the other columns that had gone to zero. I've tried different settings in the Project Calculations and Admin Preferences Earned Value, but nothing will fix this.