I agree with these answers “but” it is really a decision or lack of a decision by the front desk staff once aboard. We sailed on Conquest and made Diamond on our first day and asked what the process was on boarding day and they responded let’s look into it. Never heard back so went back again on day two and told sorry but until the system updates your points from our previous cruise (back to back) they couldn’t honor. The system updated on day three but remained platinum until our next sailing a month later. Not apples to apples and would think you will get upgraded but I still believe it’s all about what the staff onboard believe and are willing to do. In my case NOTHING.