Hello @MarkV97309 ,
It looks like this is a very recent issue that our engineers are still investigating the root cause of. I've gotten your case submitted to them for further review. As soon as they have an update / resolution to the issue they'll let you know. They're hoping to have it resolved by tomorrow at the latest, and have unsubs that were re-subbed by this retroactively unsubbed again in a separate fix shortly after.
With that said, it appears the issue is mainly stemming from contacts that unsubscribed after September 18th, and uploading the contacts back into the system is resulting in them being forcibly re-subscribed, which is obviously not how it's supposed to work. I'd recommend making sure you're not doing any new contact uploads for at least the next 48 hours, as this will likely result in other unsubbed contacts being resubbed.
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