Yes, write to the Agent and tell them that you believe they are either deliberately or accidentally misleading the prospective buyers, contrary to Rule 3 of their Rules of Conduct here:
3. Honesty, fairness and professionalism
An agent must act honestly, fairly and professionally with all parties in a transaction.
An agent must not mislead or deceive any parties in negotiations or a transaction.
If that doesn’t work, go HERE to lodge a complaint with Fair Trading.
But to be on the safe side I would make sure your issues were properly minuted at an Executive Committee meeting ASAP.