As regards #1, it is probably a good idea for the mission designer to avoid placing the movable fortifications on roads. SB keeps you from moving them onto the roads in the planning phase and evidently the behavior prevents you from selecting them and moving them off of the roads if the mission maker placed them on roads. A solution to this is to be careful in placing them as a mission maker.
I'm investigating #2 also, I seem to be having the same issue as Mirzayev.