In the ArcGIS Hub/open data portals that our org shares data to, the "Export public catalog (CSV)" option produces a download with many duplicate records, and it appears the record count of this CSV, including duplicates, is what is shown as the number of records in the portal. The good news is that the duplicates seem to only be present in the CSV and don't appear to be discoverable by searching the portal (i.e. if there's 2 or more duplicate records in the CSV, only 1 is returned from a search in the portal), but the bad news is that this appears to be a bad bug that is not helpful to users wanting an accurate inventory download, and that portals seem to be using inaccurate count stats that include the duplicates? Please see attached graphic showing example from the California State Geoportal. I've also noticed this same behavior in our own Hub/open data portal (Hub standard). I'm guessing this may have something to do with duplicates being generated on the back end due to item updates, but are not reflected in live searches, but the CSV download is generated from the back end? We could open a case for this, but it appears to be affecting many organizations, so thought I'd report it here, thanks (P.S. years ago we experienced duplicate records issues with Hub that was related to the automated way we were updating records and needed Esri to help us fix that, but hopefully this current issue doesn't seem as complicated to fix?).