Only one upset in Episode 2, and it was a minor one (#3 beat #2).
Lightweights
6. 
Richie Whitson beat 8. Paul Bird
7. Santino Defranco beat 9. Waylon Lowe
12. Cameron Dollar beat 15. Tom Hayden
Welterweights
3. Mark Miller beat 2. Kevin Knabjian
4. Jason Pierce beat 12. Ryan Biglar
5. Damarques Johnson beat 7. Ray Elbe
So far, the higher seed is 9-4. In one bout, both fighters were unranked.