Otamatea, another side caught in the logjam between third and ninth place, were beaten 41-29 by Old Boy's Marist.
With the win, OBM move to the top of the table.
Western Sharks catapulted themselves into the top four, beating fourth-placed Wellsford 31-5 at Farmlands Park.
Hora Hora, like Kamo, have given themselves an outside chance of making the top four with a 49-17 win over Hikurangi.
The week's results have shaken up the finals race with just three rounds to go.
Meanwhile, the top two sides in the Bay of Islands Seniors increased the distance between themselves and the pack.
With two top-four clashes, both Ohaeawai and United Kawakawa looked to catch up to the leaders.
However, Moerewa and Kerikeri proved why they are the teams to beat.
Moerewa dismantled Ohaeawai 44-5, while Kerikeri defeated United Kawakawa 28-10.
In the other results, Okaihau beat Otiria 22-17 and Kaeo took the home win over Kaikohe 24-14.
Awanui maintained their lead in the Mangonui Senior competition with a 51-12 victory over Panguru.
Kaitaia picked up a 41-10 win over Aupouri, while Te Rarawa snuck home with a tight 20-15 defeat of South Hokianga.