You have it listed as Barrera going down twice. I was just wondering if the second knockdown was official.
In my opinion, the fight ended in chaos. After the first knockdown, Jones backed Barrera onto the ropes and started wailing away. Barrera didn't fall again until after the bell to end the round had sounded. Almost simultaneously, the referee was rushing in to pull them apart with his back turned to Barrera's corner, who did come into the ring about a second early (I don't know how the ref could have seen this). If he officially disqualified Barrera because the corner entered early, how could the second knockdown be official when he fell after the bell rang?
This is worth checking into.