A person can have multiple addresses. Which one will be used when exporting to address labels or other places in the system?
It depends if its adress labels or another place.
For address labels the priority is:
For all other places address is used in the system the priority is:
Home billing address
Work billing address
Home mailing address
Work mailing address
If a person have several addresses of the same type, then the address that was first added to the system take precedence.