Yes, I do know that we were able to move them once upon a time. You can't drop them on floors, but you could move them to the edge of them (possibly onto the floors, but can't recall 100% on that one). The other trade area design we have done was spacing logs out as a bit of a separator and we would move them into place when they weren't dropped exactly where we wanted them, or if someone picked up their totem or it was removed with their tribe, etc. we could move them to keep things neat and tidy.
Not the biggest deal I suppose, was just surprised when I went to move it and it wouldn't go anywhere. lol