Well... Exactly what title says, my artillery with smart missiles in them fails to hit the target

In what exact way do they "fail to hit the target"? Do they fire in a wrong direction? Too high spread? Are targets moving?
Smart artillery missiles are supposed to have far lower spread than non-smart ones, but they don't have tracking due to how they are implemented

Well... They land over the target if they are flying towards north, in case of shooting toward south they land short of the target, meanwhile if they are shooting towards east or west they can sometimes hit the target.
Could share save but it's mess with too many mods.