Racing NSW Stewards have launched an investigation into the bizarre turn of events in the aftermath of the fifth event at Tamworth on Monday.
What should have been a nondescript maiden was plunged into chaos when the judge declared Lady Billie the winner over race favourite Oakfield Utah.
The result had punters scratching their heads, with the deceptive Tamworth angle giving the impression that the favourite had done enough on the line to secure victory.