North Wales Crusaders suffered their second Championship defeat of the season, losing 35-22 at leaders Leigh Centurions.
Adam Higson scored three of Leigh's seven tries to maintain their unbeaten run.
Rob Massam, Adam Lawton, Tommy Johnson and Mark Offerdahl scored Crusaders' tries.
In Championship One, South Wales Scorpions suffered a heavy 76-0 defeat at York.
Jonny Presley crossed four times as York ran in 14 tries.