I am an Elite member and tried to add a cabin mate to a solo cruise I booked and paid the double amount, per usual. When I asked about adding someone to the cabin which I assume would only be taxes and port change additional I was hit with a large additional cabin fare amount. Is this standard practice for Princess or did I just get someone Saturday that did know how to price this change? I don't like the idea of paying a triple fare when only 2 people are in the same cabin. Is this standard practice for other cruise lines as well?