Organizing and accessing contact information in Outlook.com
I am also facing the exact same issue. I tried removing my account from all the devices as well as removed all the devices from my Microsoft account and changed the password. Even then the contact keeps coming back with multiple entries linked together. I have turned off syncing for Outlook contacts in both my PC and Phone and the contact yet multiplies. What's worse, I tried moving to Google contacts but they are not syncing to my phone. So, my Lumia 730 has 0 contacts right now and this is making me very frustrated.