Yes it makes since and I address that in Paragraph VIII. “Now one question remains.”

The short answer is the penetration was military grade. All traces of the penetration were wiped clean. Your point that they should know they were hacked is correct. They should. But can’t find who did it because all the breadcrumbs were vacuumed up. So to speak. In the end it’s trying to explain the gang that can’t shoot straight or a Marx Bros comedy. It’s not there to be explained, it’s there to be observed. And to laugh at the appropriate gags