Middle Out role in MFP In-Season

Hi,

I have a query on Middle Out role role in In-season.

As per user guide "Top down and middle out users review their targets and the plans created by the lower level users and determine how those plans compare to actuals. Bottom up users can not only review their plan to actuals, but also adjust their plan with the Update Department Plans task"

As I see the task flow, there is no publish rule defined which is good. But in the workbook "Compare Department Result to Plan", Wp version for planned period is editable, not sure why. Just wanted to know the logic behind this. Even if middle out user edits the plan (Wp) it won't change the Cp version as only Bottom can change and submit the plan and Middle Out will approve those.