There is something odd going on with 'healing' corps and loading a save.
Out of the running game I am limited to a certain number of 'heals' and have them also to split accross the fronts (Germany 2/3 west to 1/3 east). However, if I save the game after I reached that limit, then following the restart/reload I can happily spent more RPs on healing some more corps.
It seems like this information is not stored in the save and so reset after a restart. Obviously an exploit, but I guess I am actually forced to use it as I guess the AI does so as well.