Cloud Store and Google Sync (it's working...but is it?)

Does anyone know what the expected behavior of the Google Sync on the Cloud Store is? There's zero information about it in the user guide (other than how to turn it on).

I'm specifically wondering how often is the system checking to confirm that what's in the Cloud Store Sync folder is also on the Google Sync folder? If it finds an updated version of a file is it overwriting the existing version on Google?

I'm asking because we started a sync on our 80TB Cloud Store and the folder was large to start with (10T), so it's taken a week but the sync says it has completed (cool). HOWEVER anything that's been added to that Cloud Drive sync folder during the week that the original sync was happening, HAS NOT been synced to the Google Drive (not cool).

Any insight out there on how it's supposed to behave?? Are there magical settings at either end that we should be playing with?

Update: The Cloud Drive software now has a red Error message next to the google sync. Thats it. No way to find out what the error is. No suggestion on how to rectify. Nothing. Super helpful

I'd contact support directly.