Kidani will have dedicated 2BRs. Jambo House has only lockoffs. According to the first post in this thread there will be 140 dedicated 2BRs in Kidani. If you look on
page 5 of this thread, TSMIII has posted an update on the number of each room type that has been declared as of Dec 11, 2008. Of those 140 dedicated 2BRs, 54 have already been declared. Either the MS CM was incorrect about the dedicated 2BRs or maybe he/she meant there were none available on your travel dates. You could try wait listing for a dedicated 2B if that is what you would prefer.
There may be some legal requirements about how far along they are with construction of the building as a whole, but I don't think there are similar milestones for the units being declared. In Jambo House, units were being declared in Feb 2007 that had occupancy dates of Sep 1, 2007 so they were in the initial stages of construction of those units at the time they were declared. I saw one or two of those units a couple of months after they were declared and they were nothing but a hollow concrete shell! The hotel rooms that had occupied that space had been demolished and everything had been stripped to the bare concrete walls with the plumbing and wiring exposed.