There are two measures used to calculate your offers. One is Average Daily Theoretical, also called ADT. The other is Average Trip Theoretical, or ATT. URComped will use whichever number is higher to get you the best possible offer.
Your average daily play, or ADT, should stay consistent or even be higher on a shorter cruise. On a longer trip, your average trip play, or ATT, should be higher. The rate of play itself should not change just because you take shorter or longer cruises, as long as you keep your play consistent.
You can learn more about ADT and how your offers are calculated here: https://urcomped.com/home/question/300/how-are-offers-determined-what-is-adt/
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