More on KentOnline
Tonbridge dropped back into the Skrill South relegation zone when they lost at Dorchester on Tuesday night.
Tommy Warrilow's side took the lead on 36 minutes when Mark Lovell headed in a free-kick.
But they weren't in front for long, Brandon Goodship scoring from close-range to bring the league's bottom side level two minutes before half-time.
Dorchester then scored what proved to be the winner, four minutes from the end.
Ryan Case, on loan from Bournemouth, sent over a cross which was turned in by Dan Munday to send the Angels home empty-handed.
Maidenhead's 1-1 draw with Chelmsford lifted them out of the drop zone, meaning Tonbridge are back in the bottom-three ahead of Saturday's trip to high-flying Sutton.