"The computer doesn't lie about the speeding."
Apparently, it does, if "speeding' means driving in excess of the speed limit. Even from just reading the summary, one should understand that the speed limit in these locations varies, depending on time of day, or whether children are present, etc. So, what may constitute speeding under some conditions may be a legal speed under others. "The computer" is apparently conflating the two, and sending out speeding tickets when there was no evidence of the lower speed limit being in effect.
The city seems to admit that - from the article: "The city told the Tribune that it is refunding payments made on 23,000 tickets."