HI. I'm very new to iMac and have setup the office so that we all share a calendar. iCal is sending alert emails (even though Email was not selected in the alert field) to 2 of the associates, but none to the 3rd. I have checked in preferences, but cannot for the life of me figure out why. I would really like it to stop, unless otherwise noted so at the time of Alarm creation. Please HELP!