Landkey Town 5 Merton 4: Danny Hommell smashed a stoppage-time winner.
The home side made a storming start as Chad Luxton, Dan Toleman (two), Joe Gillard and an own goal put them 4-1 up by half time.
Merton almost snatched an unlikely point as George Nancekivell, their 18-year-old captain, got two goals and Craig McConnachie and Brendan Harris claimed one each.
With both teams pushing forward, Hommell broke away to keep Landkey on course for a top-three finish.
Combe Martin 1 Putford 1: After a dramatic final four minutes, Combe Martin were rewarded with a point from their best home performance for some time.
Despite hitting the woodwork and creating the better chances, they looked set to miss out when Wayne Pomeroy gave Putford an 86th-minute lead. But George Gaddes marked his return to the team by claiming a late equaliser.
Northam Lions 0 Shamwickshire Rovers 1: Billy Parsons scored the first-half goal to give Shammy the derby victory.
Braunton 4 South Molton 0: Defender Dave Bennett and his son Charlie in goal helped Braunton keep their 18th clean sheet in all competitions.
The goals came from Ryan Hawkes (two), Dan Crocombe and Matt Hunt.
Lynton and Lynmouth 1 Barnstaple FC 7: Barnstaple FC raced to a 5-0 lead by half time and a comfortable win was completed by Connor Nash (two), Tom Nash (two), Stuart McKinnon, James Maynard and Ryan Isaac.
Woolsery 3 Torridgeside 1: Jules Dymond linked up with Harry Stevens to fire the opener past Woolsery's stand-in keeper Nick Glover but Ashley Glover shot through a crowd to equalise before Simon Appleby and Kyle Waldron clinched the points.
Morwenstow 0 Park United 12: Mark Hill hit five and Dave Brown got four as Park eased home on Sunday. Steve Skinner (two) and an own goal completed the scoring.