With several repeating calendar events I've had difficulties getting them to disappear from the calendar, even though I had never consciously created any exceptions from a series. In particular, there seems to be no effective 'nuke' option to get rid of everything connected with the event / item. I've tried:
1. Delete item(s) - no effect on the particular calendar event though I can now no longer find the item through live search. Which again seems strange as the item text is still in the database somehow, isn't it?