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Liam Bellamy returned to Crabble to break Dover hearts with the winner for new club Aldershot to complete a Bank Holiday double to forget for Whites.
Dover followed Saturday's 2-1 defeat at Torquay with a home loss to the Shots by the same scoreline on Monday afternoon, with all the goals coming in the opening 45 minutes.
After Shamir Fenelon had pounced on an error to put the visitors ahead, Bellamy rose highest to nod what proved to be the winner, though his fine goal was outdone by Ross Lafayette's superb free-kick on the stroke of half-time which deserved to be more than a mere consolation.
On a beautiful afternoon Jim Stevenson spurned a glorious chance to open the scoring on nine minutes when a Thomas cross from the left was chested down by Ross Lafayette, only for the former Shot man to hook his half-volley over the bar from 16 yards out in the middle of the goal.
Liam Bellamy swerved a 30-yard range-finder over Steve Arnold's bar three minutes later but the deadlock was broken on 21 minutes when Jack Parkinson failed to cut out a high ball forward, paving the way for Shamir Fenelon to get in behind and lash past the keeper.
Parkinson was turned inside out by Jake Gallagher soon after, trailing the Shots man to the touchline, only to be turned allowing the Shots man to drive into the box and force a low save from an angle.
The visitors pressure continued to build and after Nick Arnold lofted a hopeful cross into the box from the left flank on 34 minutes, the ball dropped to Matt McClure whose curling effort was just wide of the top corner.
A superb short-corner routine almost brought a goal, only for Cheye Alexander's fizzing cross to narrowly evade Callum Reynolds and Fenelon and two minutes later Will Evans lashed in a long-range shot with deflected just over Arnold's bar.
The second goal came three minutes before the break and it came from a familiar source, a right-wing cross was met by the man-bunned head of Bellamy who nodded back across goal and inside the far post to spark wild celebrations among his team, though not from him.
It was nearly three seconds after the restart when another Arnold cross was just missed by Bernard Mensah, but with Dover desperately hoping for half-time, they secured a lifeline.
First Ricky Modeste wriggled free only to see a low shot from an angle deflected behind, then moments later Lafayette was fouled as he sought to hold up play 25 yards from goal and it was the former Welling man himself who stepped up to curl a sublime free-kick into the top corner with the final kick of the half.
Whites improved after the break and it was half-time sub Ricky Miller at the heart of the turnaround.
First he got the ball down on the right and drove into the box before stinging the palms of Jake Cole from an acute angle, the subsequent corner saw Cole deny Parkinson's towering header and Miller got in the way of the follow-up which might well have ended up in the net had it not glanced the forward's head.
Lafayette should have done better after last-man Callum Reynolds missed his touch allowing the Whites man to race clear, only to be crowded out as he sought to cut back onto his right foot.
With 25 minutes remaining McClure almost sealed it when he headed Gallagher's superb cross towards the angle of post and bar, only for his effort to come down off the underside of the bar and bounce out off the line, with Fenelon unable to turn the rebound in.
Miller was not done though and he lashed in a low 20-yard drive which Cole parried to his left, and though Stevenson's follow-up squirmed under the keeper and into the net, the goal was disallowed as the flag was up for offside.
With little over 15 minutes remaining Miller drew a flying save from Cole after a Thomas long-throw and Lafayette was inches away with connecting with a header back across goal from a corner as Dover sought a leveller, but despite throwing on three forwards they could not create any further chances and it was Shots fans celebrating at the final whistle.
Dover: Arnold, Grimes, Orlu, Parkinson (Marsh 86mins), Modeste, Magri, Kinnear Jr (Moore 74mins), Stevenson, Thomas, Emmanuel (Miller 46mins), Lafayette. Subs not used: Pinnock, Sterling. Attendance: 1,093