Guernsey FC's winless run stretched to six games as they lost 4-2 at home to Faversham Town in the Isthmian League Division One South.
The Green Lions conceded twice in the space of three minutes towards the end of the first half and went further behind in the 83rd minute.
Matt Loaring and Dave Rihoy scored in quick succession to give Guernsey some hope of salvaging a point.
But Oliver Wells struck in added time as Guernsey stay fourth-from-bottom.
Guernsey's misery was compounded by a serious knee injury suffered by Jack Domaille.
The 25-year-old, who only joined the squad this season having played for Guernsey Priaulx League champions Northerners, was stretchered off in the 72nd minute with what seemed to be a serious knee injury.
He is the second player to suffer a serious injury in as many games for Guernsey after veteran goalkeeper Chris Tardif broke his leg in Sunday's 1-1 draw with Godalming Town.