In a high intensity match, a 53rd minute goal from Emmanuel Akokhia was swiftly cancelled out within 60 seconds of the restart when Tom Tolfrey found the net, followed by a Kev Terry winner in the 58th minute.
The result sees Casuals drop from 1st to 3rd in the table and Dorking Wanderers move up into 2nd.
After the match, Corinth boss James Bracken spoke commented on the match.
“I'm not going to say it's not a fair result. We could've maybe nicked something in the last fifteen minutes. We’ve put a lot of pressure on them, missed one or two half chances that might have gone in on another day and to be fair to their keeper, he's pulled out two world class saves... one in the first half and one in the second.
“They're a decent side and it was a good game. I don't think we really put the intensity in like we can to the game until the last fifteen minutes, which was obviously a little too late.
“They say that ten minute period after you score a goal is always crucial and we’ve had a lapse in concentration. Their first, we earmarked the player not to give him even a couple of yards in the box, but we have and he’s had enough room to turn and shoot.
“There’s always positives to take out of this though, such as the response from everybody who upped their game when we’ve gone 2-1 down. Everybody to a man seemed to be able to go up a gear and put their foot in. There’s no cross words in the dressing room because they’ve been absolutely fantastic since I’ve been here and one defeat in a close game doesn’t change anything.
“It’s now how we respond on Saturday. Make sure we stay in the FA Cup, go on a run and that’s what matters.”
Casuals travel to the coast to face Pagham in the FA Cup on Saturday.