That's about where the good news stopped for Harbour fans.
A scrum penalty on the half time hooter saw Canterbury take the points and hold a slim lead at the break, which was soon extended in the opening 20 minutes of the second stanza. Halfback Mitchell Drummond's intercept of a predictable Bryn Gatland flick pass led to a try for loose forward Reed Prinsep, who was soon followed over by lock Mitchell Dunshea.
Neither side were helped by yellow cards – with Harbour's Tevita Li sent for a deliberate knock on while Canterbury's Connor Collins was pinged for holding a man back.
A man up on the pitch, Harbour hit back late in the piece through Sione Teu, but Canterbury closed out a bonus point win to temporarily go top of the Premiership, and leave their hosts anchored to the bottom.
Canterbury 31 (Nathan Vella, George Bridge, Reed Prinsep, Mitchell Dunshea tries; Brett Cameron 4 cons, pen)
North Harbour 21 (Matt Duffie, Shaun Stevenson, Sione Teu tries; Bryn Gatland 3 cons)
HT: 17-14