Saints are suffering from a few things here.
A lot of players were involved in the world cup officiated by some NRL officials then spent 2 games down under playing to NRL rules that we know are interpreted differently. So they have had to up their game to that intensity.
Then they come back here after their magnificent achievements and travelling half way round Asia and dare I say it, they have looked a bit heavy legged. A bit tired and a bit slower.
Now playing to different rules at a lower intensity and the ball players are afforded more protection.
From some of the incidents I have seen the players were a split second late and looked like they knew they were going to be late but made the challenge anyway because they were probably frustrated that they were not going to time the challenge right.
The mistake Saints have made is that they should have played a team full of kids against Cas and give everybody a full week off. They were always going to struggle after the trip to Aus. They will still be the team to beat this year but they do need to keep Roby fit because I think they lose their way a bit when he is not playing.