So, I had the humans visit... Met with their liason, blah blah... I wanted to relocate my depot inside so my dwarves would stop vomiting and so my "Don't go the hell outdoors or I'll shoot you" orders wouldn't disturb trading too terribly much...
So I waited until the message said that they left. Then I used (k)(x) to remove the construction... Well, my dwarves evidently got there a tad too fast and the result was some merchant stuff on the ground and the wagon... just... kinda sitting there...
Fast forward about a year. Wagon's still there. Waiting. Nothing is around them now as, evidently, "on the ground" means "belongs to us" in Dwarven... Elven and Dwarven traders have come and gone...
Fast forward a season. Autumn now. Whoop-dee-doo, Dwarven caravan (with wagons this time, damnit) come to trade. I get excited because wagons hopefully mean a liason. Every fort I've played, the mountainhomes send a liason when I manage to attract a caravan instead of a few dolts with pack mules. No liason. I've had three dwarven caravans and no liason. I find that odd as, typically, my liason comes with the second caravan. Or after I actually trade with the merchants.
I find myself wondering if the liason is ever going to come as long as this wagon is here, yet I don't really want to kill the humans because they're kind of nice and bring lots of fun stuff to buy. Also, they're outside and I'm not entirely sure how I'd slaughter them if I wanted to.