Max Range for attack 2

[Genkora]

I was bored so I made a little map where I could load mortars into siege engines using the pick up archer/ride hippogriff abilities, and one thing bothered me. For some reason, the second attack, the one that I made to be exactly like the mortar team's, on the loaded siege engine would not go over 500. I could easily just make the mortar attack into attack one instead, but I was just wondering if attack 2 does in fact have a max range of 500, and if so, is there anyway to change it.

(this has made me want to make a full blown map based around loading units into siege engines on a side note)

 

[Faust]

A unit's range can't be higher than it's acquisition range.