you're kidding right? so counting TO a wall is different then counting FROM a wall?
I'm afraid so.
Yeah, well, not gonna happen in my world.. that's just too ridiculous.
but, tbh: never had this occur ever in a game.
The issue here is that the wall is not in a zone. It is between zones. However, distances are only measured in zones. This causes problems when trying to determine where exactly a wall is in relation to other things.
Let's look at measuring distance for effects originating from a wall first. A range of 0 always means it has to target things in the same zone as the source of the effect. In the case of a wall, there is no zone at range 0 because the wall is not in a zone. Meanwhile, a range of 1 always means the zones adjacent to the source of the effect. For a wall, that means the two zones bordering the wall.
Now, when we try to measure the distance for effects targeting a wall we have a different set of issues. If you want to target a wall adjacent to the zone you're in, we have a really serious problem. The wall is not in your zone, so it's not at a range of 0, and it's not in the adjacent zone, so it's not at a range of 1 either. It exists in between these two measurements. Unfortunately, these are the only measurements that we have available due to the way the game is designed. One falls short and the other overshoots, so neither really works and both are equally valid. This was the source of the great debate in the thread that Halewijn linked to. Instead of arbitrarily deciding to use one over the other, the official stance of Arcane Wonders is that since both are equally valid, both are acceptable to use. You can target the wall with both a ranged 0 effect and a ranged 1 effect.
I hope that makes sense. It is a bit of a headache to wrap your head around, I know.