Subscriber keeps reporting Work order IN completed.

We have a Zenworks 6.5sp1a site with 1 distributer and 15 subscribers on
remote site's.
One subscriber keeps reporting Work order IN completed / Receiving
distribution...... / Received magic data length = 8 . This results in a
very large TED.log, sometimes it grows to almost 2Gb. Normaly, due to
extended logging, it will be around 200Mb. 200Mb is readable by most
utilities, 2Gb will not load in an editor or it will take a while to load.

Has someone an idea what causes the multiple reports of Work order IN
completed?

Thanks, Erik