maybe no doors? That's a problem on some outdoor maps.
you can make them an ally, then have them non-combat and have them run away
There is an option in the settings about what the rescued escort will do once rescued. Stay or stand is an option as is follow and wander randomly. Might want to check your setting on that.
You can also set an option about what they do when delivered - if you don't want them following you forever even after being taken to the door be sure to set that one to leave via nearest door.
Ah it is not an escort - just a captive. But I am using an outdoor map with no doors. I suppose that is it. Thanks!
Ok another question for you super helpful folks... When I rescue someone in my mission, they thank me and then stand there. Why wont they run off like in normal missions?