I have activities in P6 to hold the actual costs for Work Elements, and these match the financial charge codes that are held in our corporate financial management system. These "Actual Cost" activities have no planned units, no planned cost: they just have dummy "Actual Cost" resources. As you might expect, I enter no Actual Costs against the activities that describe the work of the project and that hold the resources.
For some of these "Actual Cost" activities, when I enter the Actual Costs, I'll return later to find that P6 has assigned them Planned Cost and Remaining Cost. I haven't been able to figure out a pattern as to when it happens and when it doesn't. I haven't been able to find a setting for such behaviour.
What could be causing P6 to sometimes auto-calculate Planned Cost and Remaining Cost when the user enters Actual Costs? How do I stop it?
At the moment, I open a layout to show me cases in which this error has arisen, and then I manually zero-out those undesired values. There must be a better way, yes?