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Maidstone are up to fifth in the table after recording their first home win since February.
Ironically, that came against the same opponents, Hendon, and by the same scoreline, 3-2.
The Stones came out of the traps fast and were two up within 12 minutes. First, James Pinnock shot sweetly across the keeper from 15 yards in the 10th minute before Kevin Watson headed in his first for the club at the far post.
The visitors pulled a goal back in the 16th minute when Chris Bangura netted from close range after Andy Walker could only parry an initial effort.
But United restored their two-goal lead five minutes from time when Pinnock released Lloyd Blackman who raced through to score.
Brian Haule scrambled a second for Hendon in stoppage-time but the Stones held on for maximum points.
Dover are second after getting the better of a previously unbeaten Boreham Wood on their travels.
The Whites cruised into a 3-0 lead but were left hanging on somewhat after two late goals from the home side.
Shaun Welford put Andy Hessenthaler's side ahead after just four minutes when he drilled home from close range after a Frannie Collin effort had been blocked and Collin doubled the lead from the spot on the half hour mark after a foul on Jon Wallis.
The third came 12 minutes into the second half and again it came from the boot of Collin, who netted from a tight angle after a fine link up with Wallis.
Leon Archer gave Boreham Wood hope when he converted a 76th-minute penalty and the nerves really started jangling when Lee Allinson's long range effort with two minutes left made it 3-2 - but Dover managed to cling on for victory...just!
Margate came from behind to record their first win of the season against Heybridge at Hartsdown Park.
Regi Savage put the visitors in front in the 30th minute but Gate were level six minutes later - although there was more than an element of fortune about it as Luke Coleman's shot struck his own man Grant Peters on the back on its way in.
The 62nd minute winner was slightly more orthodox as Dan Young climbed above the Heybridge defence to head home.
Thanet neighbours Ramsgate were the fourth Kent side to come away from their fixture with three points - also their first victory of the campaign - as they won 1-0 at Harrow.
The decisive goal came in the second half when Aaron Firth pounced on a loose ball after Dan Dolton's effort from distance had been fumbled.
Meanwhile, Dartford took a point from their match against Wealdstone at Princes Park despite having to play for 80 minutes with 10 men after Jamie Day saw red for a two-footed tackle.
Within a minute of that dismissal the Darts were a goal up through a Danny Dafter header - but two goals in 12 minutes from Stephen Hughes turned the scoreline around by the 25th minute.
However, Dartford kept at it and were rewarded with a 37th minute equaliser from Rob Haworth. And they might even have won the game in the second half had the post not denied Lee Noble.
Tonbridge were the only side to take nothing from their game as they slipped to a 2-0 defeat at home to Tooting & Mitcham.
A Leon Legg own goal set the visitors on their way in the 21st minute before Martin Grant capitalised on a defensive error on 69 minutes and slotted home past, bizarrely, Martin Grant in the Angels goal.
Anthony Storey missed an 86th minute spot kick to cap a disappointing afternoon for Tommy Warrilow's side.