As far as I am aware, RSS does not track the load transfer when a wall is sitting on a one-way deck without a supporting beam or wall directly below.  The loads from the wall above the deck is "lost".  My firm does a lot of multi-family construction with light frame wood construction over a precast concrete or PT podium.  We like to use RSS to help track loads to the footings, but we spend a lot of time transferring the loads from the wood bearing walls above (modeled as "other" type walls) onto the podium level through the use of manually inputted line loads.  Transfer loads from columns are properly accounted for in RSS... why not walls too?