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Maidstone suffered a 4-1 defeat at Horsham in the Women's Conference East.
Zeph Fisher put the home side ahead after 10 minutes, before Suzanne Leaning equalised three minutes later for Maidstone.
Two goals in two minutes from Ellen Seaniger and Fisher after 41 and 42 minutes put Horsham in control and gave them maximum points.
Maidstone remain rooted to the foot of the table six points behind Staines, who drew 2-2 with Harleston Magpies.