Yes, I know, you could be, and I hope you are, right, but I counted four for a reason: this issue came up a long time before the current surface segment restriction, and that time AA (IIRC) counted as stops both ends of the open jaw. So, I suspect that if this was already a problem it will now become an even bigger one. IMO it is hard to argue that BKK//SIN, or any other open jaw, is not two stopovers, but here's hoping.