There were wins for both Grimsby and Luton at the foot of Coca-Cola League Two, but Ryan Lowe's last-minute equaliser for Chester meant there was no change in the standings.
Grimsby looked to be on course to climb out of the bottom two as they thrashed second-placed Gillingham 3-0 at home, but then news came through that Lowe had cancelled out an Andrew Morrell goal to give Chester a point from their trip to Bury.
That keeps Chester 22nd with 28 points from 38 games, with Grimsby and their superior goal difference one point and one place behind.
Luton remain cut adrift, but picked up their 12th win of the season in controversial circumstances by beating Macclesfield 1-0 through Tom Craddock's disputed 69th-minute penalty.
With Gillingham losing, Wycombe and Rochdale were playing for second place at Spotland and it was the hosts who snatched it 1-0 through Adam Le Fondre's injury-time strike. Wycombe drop out of the top three and are a point behind both Rochdale and Gillingham, but have at a game in hand over Rochdale and two over the Gills.
Exeter could have put themselves in the automatic promotion picture but instead stay fifth after losing 2-1 at Accrington Stanley. Seventh-placed Shrewsbury also failed to win in a goalless draw with Morecambe.
That opened the door for Bradford to move into the play-offs, but they lost 1-0 at home to Port Vale with David Howland scoring in the 49th minute.
Barnet moved seven points clear of the drop zone as John O'Flynn's late strike gave them a 3-2 win over Lincoln at Underhill.
Reuben Reid had a brace and Pablo Mills added a late third as Rotherham beat Chesterfield 3-0 at the Don Valley Stadium, while goals from Curtis Main and Danny Carlton earned Darlington three points from a 2-0 win over Aldershot.
Myles Weston got the only goal in the 39th minute as Notts County won 1-0 at Bournemouth.
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