From Adam Hughes on D2OL Forum:

"As part of the switchover to Phase II of this project, I plan to deploy a slightly updated statics server aimed at better aligning the statistics credited to a node ( or a member or a team) with the tasks actually assigned to that node. This change consists of two parts as follows:

1) When a task is assigned to a node, a database entry will be made that will uniquely identify the task as belonging to that node.
2) When the statistics processor runs to update node statistics, an attempt will be made to retrieve the assigned task from the database. If the task is found, the node will be credited accordingly, and THE ASSIGNED TASK WILL BE DELETED from the database. If the task is not found, the node will not be credited.

As you can see, submitting copies of the same results over and over will no longer result in accumulated statistics. There will now be a one-to-one relation between assigned tasks and the set of results credited to a node. Note that if your node happens to be assigned the same task at a later time (a valid situation), a new database entry will be created, and the node will be credited once for completing the new instance of the task.

This update will also form the basis of possible future changes.

Thanks, and let me know if you have questions or concerns. "