Earlier quoted context omitted.
Yeah. I see what you're saying in the parent comment – even getting this much of a response is a positive thing compared to existing practice, but it's not an overall positive. I suspect they want to avoid a possible lawsuit for unlawfully ticketing legally parked people and hope this blows over because they "gracefully addressed" their (illegal) practices. A really great response would have been, ”Thanks for contact…
OP Here. This is an amazing response from a city agency. In the end of the day, agencies rarely interact directly with citizens. The normal response to someone analyzing your data is to close up and have no comment. The fact that they admit the mistake is huge, and big step forward for Open Data and agency interaction.
All I was saying is that there is a strong moral case for people who were wrongly fined in this manner to receive refunds on their fines, and I think the city agency should do that (but almost certainly won't).