Alastair Seeley has slipped to second in the British Supersport standings after finishing fourth in Sunday's feature race at Knockhill.
The Carrickfergus rider, who came in second in Saturday's sprint race, trails Stuart Easton by a point.
Glenn Irwin was fifth in the opening race and seventh in the second.
Keith Farmer was fourth and 13th in the Superbikes and the Clogher man now lies ninth in the championship standings. Shane Byrne won both Superbike races.
Tyco Suzuki star Josh Brookes and Ryuichi Kiyonari were second and third respectively in both races.
Seeley's Gearlink Kawasaki team-mate Ben Wilson won both Supersport races while Easton had a second and a third.
Portadown man Marshall Neill was 14th in the Superstock 1000cc event.
Meanwhile Luke Johnston secured two points in the National Superstock 600cc championship by finishing 14th on his debut.