Combat Calculations - what do I miss here?

[BigDuke66]

An addition to my second post:

I toyed a bit around and tried some things, to me it looks like the odd calculator shows 20 for not having fired in the turn or previous phase
(From the manual: "If no attacking units have fired this turn or previous phase +20% Attacking Strength").

Now the point is these extra 20% should according to the manual only added if the defender did fire, if he didn't fire 20% is subtracted what makes it +/- Zero but here the modifier is added to the attacker no matter if the defender spend or didn't spend his fire.
(From the manual: "If there are defending units that have not fired this turn, but are able to fire on the attacking units -20% Attacking Strength")

Question is, is it only wrong in the odd calculation or is the actual combat calculation also broken?
In the latter case it would be a serious bug.