Can you confirm the race start line is drawn from the starting mark, to the flagpole on the starting boat?
As above, always read the Sailing Instructions WELL before each event. That said, I was at one event where the RO put the Orange flag up the forestay of the trailer yacht start boat and then sat in the cockpit. He didn't like it too much when I corrected him and suggested putting the flag on a boathook and taping that to the stanchion , that way he could sit in the cockpit and look straight down the line.
As a NRO accredited by AS/YA/AYF, I also teach the art of Race management.