Double Attack/Upgrade

I have a unit with 2 different attack types, one a piercing and the other a siege. I wanted to be able to make it so the piercing will be upgraded by upgrade X, and the seige will be upgraded by upgrade Y.

First problem: Only attack one will attack, when I issue an attack order the second attack only is able to hit, the unit moves over to the target and just stands there.

Second problem: Whenever I say that the unit uses both upgrades, the unit takes the first upgrade and makes it so both attacks use that single upgrade.

Both attacks are ranged, and both attacks have their own upgrade. They are allowed to attack similar targets, but not all the same. (First attack is air & ground, second attack is ground only).

You must enable both attacks in the editor (combat - attacks enabled field) for the other one to work. I don't think there is a way for an upgrade to affect only one attack.

You could give one attack 0 upgrade bonus but a dice bonus... or something like that.