I'm sure this has been discussed/posted here before, but I couldn't find anything on it. I have a PM who has a project of 430+ tasks including summary tasks of which 54 detail tasks have resource assignments. The balance of the tasks are what are being called tracking tasks for schedule. When the PM does his updates in MSP v2010 and uploads to Clarity the dates on the non-assigned tasks are being skewed and then skewed more when opened again from Clarity. This includes finish dates on tasks that have been marked as 100% complete. It appears that the tasks with assignments are working as designed. I've seen this in the past with tasks having assignments, but not tasks with unassigned resources. The date skewing in some instances are years.