What happens if I buy a property in a trustee sale and I check this site and it now shows cancelled after I bought it?

See above

Hi Mike,
You would want to contact support at support@foreclosureradar.com with the address so that the research team can immediately review the information. It could be that the trustee is reporting the outcome incorrectly, it could be a data entry error. The support team is always happy to help with any of your questions.