Carlisle squandered the opportunity to put daylight between themselves and seventh-placed Notts County in League One when they conceded a last-minute equaliser at struggling Wycombe.
The Cumbrians took the lead 17 minutes into the second half when Jon-Paul McGovern produced a sidefooted shot which hit the bar with home defender Grant Basey the last person to touch the ball for an own goal.
Carlisle appeared to be heading for all three points but the Chairboys scored what could prove to be a vital equaliser in the final minute. Stuart Beavon played a ball to Stuart Lewis who drilled a ball from 20 yards into the top left-hand corner of the goal.
The draw sees Wycombe just one point off safety while Carlisle are two ahead of Notts County in the final play-off place, after the Magpies enjoyed a 3-0 win at Leyton Orient - though that the victory was less emphatic than the scoreline suggests.
County went in front with 20 minutes remaining against the run of play as they took advantage of a mistake by Orient goalkeeper Jamie Jones. He dropped the ball and Damion Stewart made sure, slotting home with the Orient defence looking on.
The visitors doubled their lead six minutes later when Lloyd Sam's cross found Jeff Hughes in the six-yard box and he made no mistake, and Sam then turned scorer with the final goal into the bottom right-hand corner in the last minute.
Colchester and Hartlepool drew 1-1. The visitors took the lead when Evan Horwood's cross was headed home by Antony Sweeney in the 17th minute but their hosts drew level with nine minutes to go, with Freddie Sears taking full advantage of a penalty after Gavin Massey was fouled in the box.
Stevenage's fading play-off hopes were dealt another blow when they went down to a 3-0 defeat at Tranmere.
Tranmere made an ideal start by going ahead in the second minute, with on-loan Jake Cassidy first to pounce when Ash Taylor's header was parried by Stevenage goalkeeper Chris Day. Nine minutes later Cassidy made it 2-0, heading home Andy Robinson's corner, and 13 minutes from time Lucas Akins fired home John Welsh's cross.
Scunthorpe moved further towards mid-table with a 1-0 win against Exeter, who remain deep in trouble. Jon Parkin scored the only goal of the game with a little under a quarter of an hour remaining, firing home after collecting the ball from Jamie Reckord.