[dnanian]

I don't know what your account would have to do with cron, which is a 'global' system daemon... you could try removing the existing schedules, then run

crontab -r

in Terminal, then set it up again. That would certainly 'clear out' the existing cron-specific information.

I'm surprised -- since cron is a standard part of OSX itself -- that the Apple Genius didn't have any other suggestions to offer, though, if they've seen it before. They must be as confused as I am.