SH are in a hurry, so Jimbe took Zoro away even if the fight wasn't finished and told him "yeah, yeah, you won, sure, now let's go" because he know Zoro has that "warrior pride" and wouldn't have left that place until Lucci wasn't totally K.O.ed (that would have taken other time).
It's not so difficult to comprehend.
Anyways, Zoro was obviously winning, so it's not a big deal for the swordbois. He didn't one-shot Lucci after 1h stall as they wanted, but he proved himself stronger than Lucci.