Colby and Braddan dealt the promotion chasers a blow in JCK Division Two on Saturday.
Onchan had to settle for a point in a goalless draw at improving Colby.
There was even more disappointment for second placed Union Mills as Geoff Murphy’s 15th minute goal gave Braddan a 1-0 victory at Garey Mooar.
In the only other game in the division, a second half goal from Barry English separated Pulrose from Foxdale.
Football: Railway Cup hopefuls all maintain pace in premier league
Castletown stay four points clear atop Division 2
Rugby: Vagabonds Ladies stay top with another victory
Vagabonds men and Douglas also take respective wins on home soil
Hockey: Harlequins A beat rivals to close in on prem leaders
Bacchas B take important victory in battle for top-flight safety
FC Isle of Man torn apart at Barnoldswick Town
It's the Manx side's heaviest ever league defeat