In it, the creator has one version for facing east/west and one for facing north/south. Why is this? I have made a simplified version, which I've taking a screen shot of below. I cannot understand why facing east/west changes the behavior of observers.
I also can't figure out what is going in the broken version. Items end up in the top dropper, instead of the chest. I hear a click when it fires as well. So this tells me that the north/south version is firing too fast and the top dropper is triggering before the item is in the dropper. But why?