Why Duplicates Happen
Dinopix deduplicates on email, so duplicates usually come from someone using two different addresses, or from an import where the email was missing or misspelled.
Merging
Select two or more contacts in the Customers list and choose Merge. Where the records disagree, on different phone numbers or different companies, you're shown both values side by side and pick which to keep, field by field. Nothing is guessed for you.
What Comes Across
Orders, cases, notes, linked reviews and messages all move onto the surviving contact. Secondary emails and phone numbers are kept as alternates, so future syncs on either address match the merged record.
Prevention
If a customer regularly orders from two addresses, add the second one to their contact rather than waiting for a duplicate to appear.