The criteria for matching duplicate contacts is: first name / last name / phone number / email.
The PastorsLine–PCO integration works a little bit differently to our other integrations. As a result, a blank phone number (no phone number) was causing false positive duplicates.
Our team has fixed this situation.
Now, we take the phone number out of the equation as needed.
Web App (V1), Contacts, Integrations, Fixes, Integration - CCB