Ten-man Horsham conceded a 95th minute goal which cost them three points and forced a 2-2 draw at home to Tooting & Mitcham.
Stefan Cox was allowed to run to the edge of the area unchallenged to score the last-gasp goal which denied Hornets victory.
Horsham had to play the last six minutes plus seven minutes of added time with only ten men after Tony Nwachukwu was sent-off for his second bookable offence.
Hornets had twice held the lead thanks to second half goals by Bailo Camara and Nwachukwu.
Tooting equalised for the first time just three minutes after Hornets had taken the lead through a penalty put away by Frankie Sawyer.
The result combined with Redhill’s 3-1 defeat at home to bottom placed Ramsgate to keep Horsham in second to bottom position.
HORNETS: G Williams, Hope, Obersteller, Byrne, Hughes, Branford, Welch (Otobo 77), Vickers (Page 67), McCreadie, Nwachukwu, Camara. Unused subs: Lockyer, Otobo, Akande, Page, T Graves
TOOTING: Badiali, Sebuliba, Gordon, D Graves, Knock, Alimi, Khan (Nkoma 85), Marshall, Summers, Sawyer, Cox. Unused subs: Quarm, T Williams, Gonsalves,
REFEREE: Leigh Crowhurst (Uckfield)