by Emma Richardson.
Ok, so cron is running almost exactly two hours following the scheduled tasks. I suspect a time zone issue...I would still get down to one a day till you get through an initial run. I have been noticing that mine are taking hours to run and initial run took several hours (I think I have something going on though that I have not had time to trouble shoot because they should not take as long as they are on my server!)
Occasionally, a problem with one course will stall out the run too. I suggest turning them off for a day just to clear anything out (hopefully) and then turning it back with just one time selected. See if you can then get through it once.