We have a custom object that is associated to the SFDC Contact object. We set this up in Marketo in mid 2018, and are now working to run a campaign on contacts with an associated custom object the meets specific criteria.
We've built the smart list to be "Has related object" with a constraint on one of the fields. This list pulls us 73 contacts (all of which do meet this criteria).
The issue is when we pull a report in Salesforce to double check the number of records with the same criteria we get 143, so we're missing half of the audience. What could be the reason for the discrepancy?