A disallowed goal and the agility of home goalkeeper Dan Eason stopped Town from claiming a second successive away win at Belmont on Tuesday night.
Substitute Zac Attwood was denied his first goal for the club by an offside flag, before Eaton’s triple saves looked set to send Micky Collins’ side back up the motorway pointless, only to be beaten by William Johnson-Cole’s deflected strike in the eighth minute of stoppage-time.
The stats of the game, between last season’s Southern Counties East League Premier Division champions and runners-up make very impressive reading - a total of 25 attempts on goal - Sevenoaks edging it 15-10 - 8-6 on target.
The boss named the same starting line-up which achieved the historic first win at VCD -continuing with the 4-5-1 formation.
Stephen Smith put Whitstable ahead on 31 minutes, punishing a defensive mistake to shoot past Ben Bridle-Card.
The hosts hit the woodwork twice as Town lived dangerously at times, and went close on two other occasions, before Osman Proni missed the chance to equalise, heading over the bar shortly before half-time.
Fraser Walker and Proni put chances wide soon after the restart, before Eason made his first save of the night, keeping out Rob Saunders’ 52nd minute close-range header from Alec Fiddis’ corner.
The game changed 13 minutes later when Whitstable midfielder Chris Saunders was sent off following a challenge on Tom Ripley, his second red card in successive games.
Home boss Scott Porter was then ordered from the touchline by referee Kane Dempsey, as things got lively on and off the pitch.
Johnson-Cole replaced Ripley with 17 minutes, in Town’s third change of the night.
Attwood on for Greg Benbow earlier, fired home, only to see it ruled out for offside against Kenny Pogue.
Scorer Smith went close to a second at one end, before Mr Dempster ruled there should be six minutes added time.
Eason kept out Pogue’s header, and pushed Fiddis’ effort away for a corner.
The game continued and it was Johnson-Cole’s moment to strike, his left foot shot deflecting off defender Rob Gillman, at last beating Eason - and earn Town a share of the spoils.