I have run into this a few times lately where a scheduled job set to run at a later time immediately takes off. This is a pretty big issues as one could imagine. This happened to us today. We have 40 or so systems scehduled to have Office 2007 install tonight after busness hours. Well about 10:00 this morning our help desk calls me saying that are receiving calls that systems are rebooting. Sure enough, I show 20 or so system active in my scheduled task however the actual task doesn't not show it to be running, it is just sitting there with the little arrow telling meit is scheduled. This was a push standard multicast distribution.
The other time I ran into something wierd with this was I told a job to run again on all devices that failed. There were around 5000 that we sucessful and 50 that failed. Once the job started, it ran on all 5000 systems but not the 50 that originally failed.
In the 2 years that I have been running LANDesk at our company I have never seen this behavior until recent. No changes have been made. I have checked the time and date on the server, all of which is correct. I thought I would post here before calling support to see if anyone else has had this issue. I am currently not scheduling any tasks ahead time until this is resolved.