Wycombe striker Scott McGleish converted a last-minute penalty to give his side a 2-2 draw against Peterborough which denied Posh a chance of automatic promotion.
Stefan Oakes had given Wycombe a fifth-minute lead but goals from George Boyd (66) and Liam Hatch (83) looked like they had given Darren Ferguson's side the points.
But Boyd brought down McGleish inside the penalty area in the 90th minute and the Wanderers striker dusted himself down to score from the spot.
Posh would have claimed one of Coca-Cola League Two's automatic promotion places if they had won as fourth-placed Darlington slipped to a 1-0 away defeat to Stockport who scored through Liam Dickinson in the 37th minute.
Hereford remain in the third automatic promotion berth despite a late Kevin Ellison penalty giving Chester a 2-2 draw at Edgar Street.
Ben Smith (25) and Gary Hooper (35) had put the Bulls ahead but Kevin Sandwith (68) and Ellison's spot-kick in the third minute of added time ensured honours finished even.
Rene Howe (47, 55, 90) came off the bench to score a hat-trick which gave Rochdale a 3-1 win over 10-man Grimsby who scored a late consolation through Andy Taylor (85). Nathan Jarman was shown a second yellow card for the visitors.
Strikers David Dowson (47, 90) and Jamie Ward (50, 59) both helped themselves to two goals apiece as Chesterfield thrashed Shrewsbury 4-1. Kevin McIntyre (81) was on target for the Shrews.
Wrexham's plight looks forlorn after the were held to a 1-1 draw by Macclesfield at the Racecourse.
Defender Steve Evans (79) equalised Jamie Tolley's 52nd-minute strike but the Dragons are seven points adrift at the bottom of the table.
Fellow relegation candidates Mansfield threw a away a two-goal lead to draw 2-2 with Barnet but closed the gap between themselves and 22nd-placed Notts County by a point.
Michael Boulding (14) and Matthew Hamshaw (55) had given the Stags the lead but Anthony Thomas (70) and Adam Birchall (77) rescued a point for the Bees.
County slipped a 2-1 defeat to Bury who took the points thanks to Glynn Hurst's goal three minutes from time after Danny Crow (71) had levelled Adam Rooney's 18th-minute opener.
Bradford claimed a 1-0 win over Morecambe thanks to Eddie Johnson's 56th-minute winner while Rotherham's poor run continues after they suffered a 2-1 defeat to Brentford.
Millers midfielder Mark Hudson (87) had equalised Nathan Elder's opening goal but Alan Connell scored in the third minute of added time to give his side the win.