Ah, that's frustrating, must be that then. I don't know arty well enough so both times I thought they would correct or were enemy spotting rounds... until the full salvo came in the middle of my own platoons. And the spotter's there patting himself on the back at the end of turn 'fire mission complete'):
Don't really know how to clear a corner with enfilading fire, long roads and bocage like this then if offmap is so incredibly unreliable. Does bombardment/mission length affect accuracy?