Okay now this will be the last post in this topic since I can edit now... no one's answered my other questions but oh well.
I'm using the engineering upgrade with two other skills, but they don't seem to be upgrading fully. One of them is Dark Portal; at max level and max engineering level its supposed to give high level units, but instead it gives some of the low level ones that I set for the level 1 and no engineering upgrade and some of the high level ones.
Another problem: when I give the property Ethereal to a unit it has the tooltip missing picture... how do I give a unit Ethereal without having it as an ability, if you get what I mean.