Why should it be FREE! You SHOULD have to pay.
Then, when invalid data is encountered, you have the RIGHT to complain.
Then, when incorrect, misleading, blatantly false data is found, you have the RIGHT to complain.
Because it is free you have neither the legitimate right to complain and the organisation providing the data has no obligation to ensure the integrity of the data. In essence you get EXACTLY what you pay for. (exception: RealtyTrac)
There is no less than 15,000 available options that allow you access to bank owned real estate. All affiliated with folks who PAY (on your behalf) to make accurate, relevant, timely, reliable data available and are accountable for the data. They have volunteered their resources. So, take them up on it.