There are two quests given by NPC named Cork Gizelton.
https://classic.wowhead.com/quest=5821/bodyguard-for-hire
https://classic.wowhead.com/quest=5943/gizelton-caravan

I believe you cannot complete both quests.

I've finished quest: gizelton-caravan, but quest: bodyguard-for-hire, is still showing up in my map. When I talk to NPC Cork Gkzelton, he doesn't give me quest: bodyguard-for-hire.

Screenshots

Questie version

6.0.2