An Abraham victory gives you a lot of boxrec points, but how do the sums on there add up? Bute is no.1 Dirrel is 2 Froch - 3. Froch has beaten the new no.2 in his previous bout
Trying to rank boxers is like trying to staple diarrhea to the wall. Boxrec makes as good a bash at it as anyone. As the above poster said beating Abraham gets you A LOT of points. That's fair enough IMO. If Froch beats Kessler he'll probably take over the top spot.
Because he beat Abraham, who was ranked 1 by boxrec for whatever reason. Also the Froch fight was a SD so Froch because he was the favourite lost points and Dirrell gained points.
What Dirrell does after the Froch fight has no impact on Froch's ratings. Froch actually lost a few pts beating Dirrell on a SD because Dirrell had done fairly little as a pro up to then. You can see how a boxers boxrec points evolved by going to a boxers record and clicking on "ratings on" in the bar just under "bouts" btw.