Generates duplicates, no response to feedback – Sync your Contacts for Google Review

I didn't mind paying extra to remove the contact limit. The first time I ran it, it worked like a charm. My company limits access to the Google Apps account, so this was the only way to get contacts on my phone. I synced the Google Apps account with a regular Google account. Any time after the first sync it does not recognize contacts as being the same and generates duplicates. This happens again and again. I had run it a few times before I realized. In some cases I had 4 or 8 of the same contact. It took a while to clean up my contact list. I sent feedback from within the app, but never got a response.
Review by gormanab on Sync your Contacts for Google.