Chris O'Keeffe, chief executive of IBAS, says their stand was busy through both days.
"What was surprising is that many bookmakers do not seem to understand the boxes they have ticked to get a new licence - they have told the Gambling Commission that they have an independent adjudicator in place!"
He says they last took a stand in 1999, but felt this year it was appropriate given the dramatic changes taking place as a result of the Gambling Act.
"What I noticed straight away is the truly modern feel to the show," he said. "The one in 1999 took place in the old motorcycle museum and felt more like a church bazaar. And another difference is that a main talking point this year was moaning about the new regulations!"
The top three betting dispute categories currently examined by IBAS are: 1. 'Late bets on horseracing; 2. Palpable errors (prices laid in error); 3. Ambiguous instructions.
O'Keeffe also paid tribute to Sir Tristram Ricketts, chief executive of the Levy Board who died of pancreatic cancer this month.
He said: "He was our chairman for the past two years and will always be held in our memory with the deepest affection."
From BBC Sport