Mac contacts and iCloud contacts different.
I have 2 x iPhones and a Macbook running OS Sierra. All have same iCloud account. Contacts ticked to synch on all. However I am now seeing 2 sets of contacts on my Macbook. One called "On my Mac" and one called iCloud. There is a difference between the 2. And worse I am now seeing duplicate birthdays in my calendar because it is picking up both calendars. It is driving me crazy. Help dear community.