Couple of questions on this for ya:
1. Are they ON the ground, or are part of them going THROUGH the ground? Sometimes when placing characters they get placed with their feet slightly going through the floor, and that causes them not to move. When placing them, hit the Enter key first, and then left click. This will align them with the floor properly.
2. Can you post some screen shots or videos of what is exactly happening?
3. Is this all characters? Or just certain ones? Which ones have you tried?
4. What segment (room) are you placing them in? What entities are surrounding the characters?
Priest of the Church of Joe Wood