I'm with George. Nothing jumps out. The clocks shouldn't cause this, though you probably want them to get in synch. Could possibly be something there, but I'd think the job would be dependent only on the active node.

If you've got a case to open with MS, this would be interesting to track down, though probably not terribly useful as anything other than trivia.

One last thing, are the jobs running ok, meaning getting the work done? If so, I'd wait for the next reboot, hope it goes away.