Caversham scored an astonishing 15 goals against Northern, and Green Island beat University 4-0.
At Memorial Park, the evenly matched Mosgiel v Roslyn Wakari game finished scoreless but might have also produced a bag of goals from the attacking chances produced.
Caversham, possibly mindful of goal difference being discussed before the game, showed no mercy against a Northern side that was woefully weak and short of regular first team players.
It was 6-0 at halftime, and Caversham's ruthless finishing set a record for the FPL in its present format.
Lethal striker Tom Jackson (seven) and Andrew Ridden (four) led the rout. Lewis Jackson (two), Seamus Ryder and Logan Wright Webb also scored.
There was no argument from Northern coach Murray Devereux, who congratulated Caversham on its attacking play.
Northern youngster Tadhg Kelly battled bravely, and Louis Peyroux came off the bench to make his premier debut at the age of 16.
At Sunnyvale, Green Island hit consistent optimum form to overcome a student side by four clear goals, and the score might have been doubled.
University coach Darren Hart claimed that his top two sides had lost 20 players due to students not being available, and for some players, the match was their second of the day.
But it would be churlish not give Green Island full credit, as waves of attacks swamped the students, won almost all second phase play and created direct passing moves that usually finished with a shot on target.
Varsity keeper James Berry made some valiant saves but the home side was quick to punish any loose clearances. Nathan Gunn, who had a storming match, opened the scoring after 25 minutes, Nathan MacDonnel made it 2-0 just before halftime, and Green Island hit the Varsity woodwork three times, before Andy Marshall scored twice to nail the coffin lid firmly shut.
Varsity player coach Hart was a stabilising influence, and captain Henry Flood, Tom Eminson and Tom Morley never gave up, but there were too many gaps to plug.
At Memorial Park, the game had an explosive start as Roslyn Wakari forced several corners and free kicks. Then, on the break, Mosgiel's Regan Coldicott raced clear and lobbed keeper Tom Stevens, but his goal celebrations were cut short by a linesman's offside flag.
Both teams played bright and attacking football, but both defences allowed few clear chances.
Mosgiel keeper Zane Green marshalled his defenders into a tight screen from which Hamish Cotter, Aaron Corkill, Jesse Wright and Tom Kindley were a sound platform for the midfield to break out.
Roslyn also suffered from missing players and a large gap was left by Tyrrel Barringer-Tairi, who was involved in trials for selection in the Cook Islands national team.
