How to report a false positive
http://www.phishtank.com/faq.php#howdoireportafalsepo
Phishtank is a group of unpaid volunteers who work tirelessly to detect, report and confirm phishing sites. They are highly respected for their work, and widely acclaimed by rating systems. Anyone who finds that their site has a poor rating should first of all clean up the phishing page(s), then apply suitable measures to avoid further explotatain, and then notify the phishtank community that the rating can be changed.