Andy Hessenthaler's Gillingham succumbed to sixth home defeat of the season at a time that they really couldn't afford to but results elsewhere mean they do still harbour hopes of a place in the League Two play-offs.
The result saw the club remain in ninth place, but have been joined on 62 points by Steve Evans new club Rotherham United, but they are now four points behind both Crewe (eighth) and Oxford (seventh) but they do of course face a trip to the Kassam Stadium next Saturday.
We all know that the Gills can unfortunately never do things the easy way.
To make matters worse John Still's battling strugglers have now completed an unlikely double over Gillingham following their 2-1 home victory at the end of December. They are now nine points clear of the bottom two.
The Gillingham boss named the same starting XI that had picked up a point in Friday's game at Bristol Rovers, the only change came on the bench where Jo Kuffour replaced youngster Ashley Miller.
After 10 minutes of chanceless football, the game not helped by a blustery wind, the Gills were awarded a free-kick following a foul by Josh Parker on Rowan Vine. Lewis Montrose cracked the ball over the top.
Almost immediately at the other end Brian Woodall broke clear but despite his low shot seeming to take a deflection off Paulo Gazzaniga, a goal-kick was awarded.
Then in the 16th minute a dangerous low cross from Danny Jackman was clutched by Chris Lewington then moments later Vine put a rising shot over the Rainham End bar.
A decent touch by Vine almost put Danny Kedwell
clear but Lewington was quickly off his line to grab the ball off the strikers toes.
With 25 minutes on the clock a neat build up by the Gills which involved a number of players ended with Whelpdale cracking a shot straaight at the Daggers keeper.
The Gills were playing some neat football and generally knocking the ball around well but were finding it difficult to break down the visitors 4-5-1 formation as they often put nine or ten men behind the ball.
In the 38th Jack Payne broke into the area but was again denied by Lewington who was out quickly to save at his feet.
Suddenly the Daggers broke away and took the lead. Abu Ogogo broke between two defenders and fired a low shot goalwards, Gazzaniga got a hand to it but could only watch in anguish as the onrushing Brian Woodall fired the loose ball home.
The former Gresley striker then got through again but fired his effort across the face of goal.
H/T: 0 - 1
The Gills were thankful to Gazzaniga three minutes after the restart, Medy Elito got to the bye line before pulling the ball back to Josh Parker some eight yards out but his drive was kept out by the young Argentine.
Ten minutes into the second-half Daggers defender Mathieu Baudry was in the right place to clear after Whelpdale had lifted the ball over Lewington.
Gillingham deservedly levelled matters in the 58th minute when on-loan QPR forward found himself in space towards the left of the area and he curled a glorious right-foot shot beyond the diving Lewington and into the net. It was his first goal for the Gills and his first for anyone in 13 months, his last coming in MK Dons colours in a 4-1 win at Rochdale in early March 2011.
A quick break by Dagenham, following a long throw by Payne and wasn't helped by Jackman slipping over as he looked to block Elito, ended with substitute Dominic Green seeing his shot deflected into the hands of Gazzaniga.
Danny Spiller and Jo Kuffour were introduced for Lewis Montrose and Joe Martin
with Jackman reverting to left-back and the Gills changing to 4-3-3.
The Gills went behind again in the 72nd minute as substitute Green left both Jackman and Payne standing on a mazy run before firing inside Gazzaniga's left-hand post from just outside the area.
Jackman went close with a free-kick from 25-yards just prior to Friday's goalscoring hero Dennis Oli replacing Vine.
Oli got to the goal-line in the 87th minute but his cross was fired wide by Whelpdale.
As the visitors defended like Trojans, Oli had a half chance but his shot was bravely blocked by Baudry.
Gillingham: Gazzaniga, Fish, Essam, Frampton, Martin (Kuffour 69), Whelpdale, J Payne, Montrose (Spiller 66), Jackman, Kedwell, Vine (Oli 82).
Unused subs: Evans, O Lee.
Dagenham: Lewington, McCrory, Doe, Arber, Elito (Akinde 90+), Parker (Green 62), Ogogo, Woodall (Scott 88), Bingham, Baudry, Spillane.
Unused subs: Hogan, Wassmer.
Attendance: 5,773 (313 Daggers)
Referee: Iain Williamson
Assistants: Alexandra Ihringova & Harry Lennard
Fourth Official: Mick Russell