Walton Casuals' Ryman Division One South play-off hopes lie in tatters, while Corinthian Casuals have thrown themselves a survival lifeline.
Mark Hams' Stags crashed 3-2 at home to Horsham on Saturday, having battled back from 2-0 down through goals from Simon Huckle and Jamal Jimoh.
It leaves Walton ninth in the table and nine points adrift of fifth-placed Folkstone Invicta, having been comfortably in the top five in December.
Corinthian Casuals, who replaced manager Kim Harris with first team coach Matt Howard last week, made it two wins in two games with a 3-2 triumph at high-flying Faversham Town.
The result has the Kingston-based side four points from safety ahead of Tuesday's crunch visit of rock bottom Eastbourne Town.