^^it wasn't the bracket website, it was the survey website. Surveymonkey.com, just to clarify.
edit: we need some seriously sleuth work here. If we can't find the IP address what can we do? Once the dust settles we need to compare the cheated bracket vs. the true bracket and see who benefited the most from the cheating. I'm guessing one of the top 10 had 100% of the cheats guessed.