This is just a hunch, but I don't think the system directly considers what else you've bid on. I think it just runs all the scenarios and evaluates all the cascading effects of each move and picks whichever "path" makes Royal the most money. At least that's how I would write the algorithm. For example (using Anthem), let's say that there is one SL available. Below are a list of people, their current cabins, and their bids.   Anne(OS): SL - 700 Bob (GS): SL - 800, OS - 700 Bil