...it's a bit strange....
p.es: a window in 'design' does not lay a wall in 'fact state' ... is a question of phases... while (strangely!?) does not happen with the planes. during the evolution of a project can happen that the 'state of fact' is subsequently updated at several times, for the wall it is enough to intervene simply while for the topographic surface it is necessary to repeat the whole procedure.. .
Thank you