STEPS TO REPRODUCE:
1. Open Project in MSP
2. Create one task and set to 2 edays (Make sure the task does not have assignments)
3. Change the % Complete of the task
4. Save the project to Clarity and close MSP
5. Open Project in clarity: % Complete shows correctly
6. Open project again in MSP and view the task % Complete.
% Complete value remains the same
% Complete reduces to different value
Add a dummy assignment to the task, but this is not viable for milestones since they can't have assignments.