An own goal from Ramahlwe Mphahlele after 18 minutes at the FNB Stadium handed Amakhosi the lead, before Tshepang Moremi found a quick-fire equaliser, a mere five minutes later.
Elmo Kambindu then put Usuthu into the lead on the hour mark, only for an error by Ofori to hand Chiefs a share of the spoils when he fumbled the ball into to own net with 63 minutes played.
Reflecting on the game, Zwane explained that Ofori's performance had initially kept them in the game before his unfortunate mistake.
The Usuthu boss said on SuperSport: "Unfortunately football is a game of mistakes.
"[But] as I said earlier on, he kept us in the game [first half]. Sometimes when the pressure mounts, you are bound to crack.
"He made those two crucial mistakes, both of them we know on any given he'd save them, make them look easy.
"Now is our job as coaches to try and help him phsychological because we need him. He's been doing fantastically well for the team."
Orlando Pirates secured their place in a second cup final this season after edging Richards Bay FC 1-0 in the Carling Knockout semi-final at the Moses Mabhida Stadium on Saturday.
Marumo Gallants head coach Alexandre Lafitte is keeping his focus firmly on Sunday's Carling Knockout Cup semi-final against Golden Arrows, as the young French tactician looks to guide his side to a historic final appearance.
Golden Arrows head coach Manqoba Mngqithi says he is expecting a completely different challenge when his side meets Marumo Gallants again in the Carling Knockout Cup semi-final at the King Goodwill Zwelithini Stadium on Sunday.
As Abdeslam Ouaddou gears up to guide Orlando Pirates into yet another cup final, the Moroccan coach has opened up about the relentless pressure that comes with managing one of Africa's biggest football clubs.
