You've got your arrows backwards. They should point towards the top of the ledge, i.e. where you come from. You've currently got them pointing at the bottom of the ledge, i.e. where you end up.
Also, all that jumping around... Were you holding Ctrl? I noticed you were phasing through some trees. Don't hold Ctrl and see what happens.
The ledge terrain tag means "you jump over me", and that happens regardless of debug mode or not. The 4-dir passability means "you can only enter me from the sides with arrows pointing at them (i.e. arrow pointing north means you can step southwards from the north onto the tile).
If you'd looked at the tilesets that come with Essentials as suggested, you'd see how they were set up.