Vagabonds lost a lead and the points as they went down 22-18 away at bottom side Anselmians in EuroManx South Lancashire/Cheshire Division One.
The defeat means they are still hovering precariously around the danger zone.
Akki van der Berg, back from a serious knee injury, picked up a try in his comeback game and there were also tries from Jo Louw and Chris Bradshaw, plus a penalty from skipper Jonny Beckley.
Vagas actually led 18-12 going into the last 10 minutes but were unable to hang on as Anselmians made a late bid of their own to avoid relegation.
FC Isle of Man manager targeting 'reset' at AFC Liverpool
Hockey: Bacchas A with chance to secure mixed prem title
Rugby: Ramsey on the road at Hoylake in Cheshire Plate
Football: Unbeaten premier league top two to lock horns this weekend