Long story short, the exterior 2x6 walls are all 9.5" too short and Josh is now looking for a way to fix it without tearing everything out and re-doing it. There is a potential for a 6x10 beam to fill the gap all the way around the house, and the joists would sit on top of that... but we need engineer approval before we can proceed. Josh has assured me that it will be fixed, and that it will not affect the overall budget of the house.
More delays... :(
That "Rim" should be installed ABOVE the foundation wall, not level with it.