Just an FYI - in the floorplans linked above, the rooms show the main beds as kings. There are premium studios, alcoves, and executive suites with two double beds in the main sleeping area - you just need to be sure to tell the reservation agent if that is what you want. Also, the executive suite looks like it has two close off bedrooms - the second is an "add on" at an additional price. The rate + $149/nt is for the one close off bedroom and parlor room with sleep sofa.
If you have questions, call Dolphin. I have called four times now, asking about the studio/suite se-ups, prices, etc., they have been very nice and willing to answer my questions. Oh - that reminds me - at the Dolphin, the agent told me all of the premium studios have been recently updated (new wall paper/paint, new carpet, new bedding, flat screen tvs). Don't know if that is important to you. I am still leaning towards the studio.