Douglas slipped to only their third defeat of the season when they lost 54-31 away at Northwich in South Lancashire/Cheshire Division One.
They did however cross for five tries to earn them a single bonus point for their efforts.
Nick Hughes, Glyn Hooson-Owen, Carl Markl-Ferns, Daryn Thompson and Liam King were all on target with tries and Bryn Snellgrove kicked three conversions.
With close rivals Glossop also losing, Douglas hold onto their second place.
FC Isle of Man back on travels for Longridge Town test
Ravens hoping to shrug off back-to-back defeats
Hockey: League titles and relegations could be decided this weekend
Honours up for grabs on penultimate mixed league gameweek
Rugby: Douglas hoping to maintain high standing at Firwood Waterloo
Vagabonds and Ramsey both at home, Vagabonds Ladies on the road at Bury
Football: Laxey and Onchan out to secure Railway Cup spots
Castletown and Colby continue tussle at top of Division 2
Dominic Herbertson joins KTS Racing for 2026
He'll compete for team at next year's TT and North West 200