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All six Kent sides in Ryman League Division 1 South action suffered defeat on Saturday afternoon.
Play-off chasing Folkestone Invicta suffered a shock 1-0 loss at home to basement-boys Whyteleafe, with former Maidstone midfielder Ian Selley, 37, firing the only goal eight minutes before the break.
Invicta striker Stuart King saw a penalty saved on 18 minutes, struck the woodork and saw a late equaliser ruled out.
Folkestone clung onto the last play-off place, and Maidstone, who were without a game, remain sixth, as seventh-placed Godalming lost 2-1 to Walton & Hersham.
Chipstead thrashed Ramsgate 4-1 at Southwood to move within five points of the play-offs.
Matt York opened the scoring on two minutes and Bruce Hogg made it 2-0 at the break before Luke Coleman fired the third against his former club just before the hour and grabbed his second on 78 minutes.
Ian Pulman missed a penalty for the Rams while Pascal Ebigbo managed a consolation late-on.
Hythe's play-off challenge looks over after a 3-0 defeat at title-chasing Bognor Regis Town left them 12 points off the pace.
Harvey Whyte opened the scoring just before the half-hour and James Crane made it 2-0 on 54 minutes, before Kane Wills added the third just over 20 minutes from time.
Struggling Sittingbourne are just nine points clear of Leafe after a 2-0 defeat at title-chasing Dulwich Hamlet.
Ishmael Kamara put the hosts in front shortly before the break and the Brickies fell 2-0 down to a Sol Pinnock strike midway through the second half.
Faversham Town also lost to a title-chasing team, going down 2-1 at home against Whitehawk.
James Fraser and Sam Fisk goals five minutes either side of the break put the Brighton side on their way, and Dave Botterill's penalty 25 minutes from time was a mere consolation.
Whitstable Town's five-match winning streak ended with a 3-2 defeat at Merstham.
The Oystermen fell behind to James Evans' strike but Jake Beecroft and Stuart Vahid turned it around before the break.
Fabio Saravia made it 2-2 17 minutes from time before James Fray and Laurence Harvey saw red to leave it 10-a-side.
The hosts snatched the points in injury-time when George Benner found his own net.
Cray Wanderers' play-off push in the Premier Division remains on track despite a 2-1 defeat to Leatherhead at Hayes Lane on Sunday.
Wands did remain fifth, and have a game in hand and a one-point lead over sixth-placed Hendon and two games over seventh-placed Lewes who both failed to win and overhaul them on Saturday.
Margate lost 2-1 having been ahead at promotion-chasing Lowestoft on Saturday.
Tommy Murphy put Gate ahead after six minutes, but Sam Gaughran levelled shortly before the break for the Suffolk side, who snatched the points 13 minutes from time through Sam Francis.
In Division 1 North Chatham Town went down 1-0 at Cheshunt.
The only goal arrived from Josh Hutchinson nine minutes into the second half as Chats slipped to 13th.
Thamesmead Town overtook them, going 12th after crushing Great Wakering Rovers 4-0 thanks to a fine performance from Rikki Cable.
Cable teed-up Theo Fairweather-Johnson for the opener on eight minutes and doubled the lead himself shortly after the break.
An Ashley Probets penalty and Cable's second sealed the points late-on.
Picture: Micheal Everitt tries to win he ball for Folkestone against Whyteleafe