DUde, stop whining like a baby. If there is one organisation capable of telling you what your real ATAR is, it would be the UAC, not some shit house third party programme that claims to "estimate" atars. Those sites exist to generate traffic for advertising, and whilst they can sometimes be...
Ditch the name, may as well print one of these bad boys on the jersey:
http://s3.amazonaws.com/kym-assets/entries/icons/original/000/003/619/Untitled-1.jpg?1288903617
This brings up an interesting question that could be a thread of its own...
How much money is enough to make one go to UWS?
I reckon no less than a cool $1,000,000 for me