On the Facebook audience builder, things such as trusts or data entries where there isn't a first and last name will not be included because we are not able to match a Facebook accounts with out a first and last name.
Sometimes, you might notice that your Facebook Audience file has MORE rows than the original list of properties this is due to having first and second owners or the husband and the wife with their own Facebook accounts.
Data Discrepancy on the Facebook Audience List - Why numbers are not the same in the file exports
1st and 2nd owners owners - husbands and wives have individual Facebook accounts - trusts to no match to Facebook accounts
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Written by steve Hundley