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:
Home address
Other
For all other places address is used in the system the priority is:
Home billing address
Work billing address
Home mailing address
Home address
Work mailing address
Work address
Other
If a person have several addresses of the same type, then the address that was first added to the system take precedence.