Hi and thanks for sending over the iCal link.
I tested it an did not see the “En Español – Parent Meeting: Cookies with Keith” event in the iCal import feed. Was this event at any point listed on the calendar attached to the iCal link you provided? If so, and the event wasn’t removed prior to the import, it would still be published to the website calendar. Your client would then need to manually delete the event.
I hope we’re on the same page here and please let me know if I’m missing anything or something I’ve said needs clarification. Thanks again for sending that over and have a good rest of your day.