Tasks charts get inconsistent when tasks are deleted

Hi,

I've found a strange situation with milestones and tasks charts. I realized that my milestones were wrong, then I checked the tasks charts in the task folder and they were wrong also. I verified the charts still take into account tasks that were deleted.

After that I purged the deleted tasks, just to check if the charts became correct. But it didn't worked also.

As a test I created a new task folder and created several tasks and found if I purged (instead of delete) the charts still get correct values. If I delete the charts get wrong even if later I restore them and purge.

If the charts get wrong the milestones also become wrong.

Does any one know anything about it ?

Thanks