Check this out guys...I have a theory about the placement of Bo vs. Scott.
Ryan never actually 'said' that Bo and Nadia were the 'bottom two' - all he said was that Scott was safe. (Of course, we know that Bo is safe, too).
The implication is that Bo was the second lowest vote getter - but it was never said. I believe that Scott actually was the second lowest vote getter, and they let Bo stay up there for a greater impact.
In previous shows, Ryan explicitly stated that the two left standing received the lowest number of votes or "America, these are your bottom two" - but he never said that this week (watch it again and you'll see).
Leaving Bo up there will energize Bo's fan base into action. Bo will NOT be in the bottom three next week (unless his fan base isn't as large as most people think it is).