Vagabonds had high hopes for a big result away at Oldershaw but the home side snatched the game 13-10.
Vagas led 5-3 at half-time courtesy of a Ross Pullman try.
In the second half, Leigh Kennaugh doubled Vagas’ tally but the strong Oldershaw side was too powerful for Vagas in the end.
Rugby: Douglas slip to fourth
Vagabonds and Ramsey also suffer defeat
Football: Peel through to Railway Cup Final
Only seven games played on rain affected weekend
Irlam late show denies FC Isle of Man victory
Higgins double cancelled out in draw at The Bowl
FC Isle of Man to host play-off contenders Irlam
Ravens looking to bounce back from heavy loss last weekend