correct reason for mismatch:
The reports use the lowest level of OBS available. The lowest is the Staff OBS. If that is blank it goes up to the resource OBS.
This functionality is used throughout PPM for areas such as charge codes, OBS, role.
The clarity 14.2 product guide documentation states:
For the capacity amounts, the resource OBS parameter filters resources based on their OBS.
For the allocation or assignment demand amounts, the resource OBS parameter filters investment team members based on their staff OBS.
If the staff OBS is not completed for the team members, then it filters the resources based on their OBS.