Changes to Contacts on Phone are no longer being transferred to Contacts on the computer

Hi, I recently replaced my dying Nokia Lumia 735 with a Microsoft Lumia 640. Everything worked perfectly fine on the Lumia 735 and changes in Contacts synced automatically between the phone to computer and vice versa. I did however make it my practice to generally make changes on the phone first. Because of the Microsoft Account the change over worked fine. However in an exercise addressing the issue of Contact names no longer being displayed when calls come in I had reason to make changes to some phone number formats. I made these changes on the phone. Now three days activity later I am noticing that the changes have not shown up on my computer contacts. All my email accounts are working fine.
BW

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