I don’t exactly understand your question, this is what i do and what happened
I make a recurring event, everything is oke and i publish
a later moment i have to add een extra date to that recurring event
i open the event and say “bewerk alle” i think change all in english. Than i see the event en add the extra date. I safe
and then when i look in my calendar my extra date is added but de first date of the event has duplicated.
hope you can help me resolve it.