Duplicate birthdays in ical
Here's what happening:
Duplicate birthdays shown in iCal on my MacBook, but single contacts for the people in Contacts.
There is only one Birthday calendar in iCal.
Also single birthdays shown on iPhone and on iCal in iCloud for those people.
And the same thing is happening on my iMac at the office.
Please don't send me to https://support.apple.com/en-us/HT204123. It doesn't compute.
Thanks.