Thanks for the rules clarification on the second point.
But for the first point, then there's no way for two people to drag someone somewhere? Say if two town guards (cops) are trying to drag a thug (gansta) away... only one could the other would keep losing his grip?
I guess it's one of those things that always a little funky with a phased initiative system. Kind of like how people can't actually march in sync, it's always person 1 who moves, then person 2, then person 3, etc. Readying actions can help but is clumsy and creates it's own problems (for example they can only take single actions each round).
It's usually better to assume for out of combat things like the cops dragging away a gangster that it just works because your not in an initiative/combat system anymore. For in combat things like the zombies, readying is the best your going to do. Of course is zombie one pulls the person in the pit, there's nothing stopping zombie two from jumping in after him.