Two issues: One, in a matter of dispute, he is claiming his own logs as proof -- which is nonsense. Two, even if the logs are legitimate, the error could have been somewhere between the computer and the user (e.g., the user might have been getting wrong information).

In either case, Tesla is being very unprofessional. Very petty, too. Think about Musk: he created PayPal, where he was a total scumbag. Why would it be different here?