I read the article you mention in your message, but the problem is that when I enter icloud.com to check my Calendar, it is empty, no events.
In the article there's a paragraph that says:
- Refreshing your Calendars in Calendar:
To refresh your calendars, simply choose Refresh Calendars from the View menu in Calendar. While Calendar is updating and refreshing information, Calendar will display the text "Updating" in the Title Bar.
When I choose the option Refresh Calendars from the View menu of my Mac Calendar, nothing happens. I cannot figure out why the events are duplicated in my iPhone Calendar...
Thank you for your help.