Add another date and delete a date

Hi,

Within the WP-Calendar event editor I am not able to “Add another date” or delete a date. When I create a weekly pattern and need to delete some of the dates, it says that it is deleted.

But after updating the event and going back into the “View scheduled dates”, the ones I deleted are back.

Not able to add another date. I do the steps to “Add another date” and it indicates that it was added.

But after selecting Update, the added date isn’t there.

What am I doing wrong?

Thanks,
Glenn