The only thing he did wrong for me was to penalise Smurph for having a hand in when you could quite clearly see that it was being heldc in by the Cas player.
Some of you may also like to watch the markings on the pitch in future because the ref was actually going back 11 yards therefore the players in front are onside but may appear to be off. Another problem we have a lot of the time in defence is that we take about 2 steps forward at the play the ball then wait for the opposition to come to us, whereas other teams take 4, 5 or even 6 paces and then make the tackle thus they again seem to be offside. IMO we need to move up quicker as a unit and stop the yardage.