I need some help with passability...

[GioHiTech]

So I made a city in essentials. This is the layout:

As you can see, the city is on top of a Hill.

These are the tiles I'm using for it:

And this is the 4dir of them:

It's supposed to let you walk behind the mountain but not cross into it. However, it only works sometimes:

(Red means you can't cross it)

I don't know what i did wrong.

Also, I have a lake autotile that ALSO only works sometimes.

Can someone help me out with this?

 

[HarmonyConcept]

Regarding your 4dir picture, the player should not be able to walk on the five tiles on the top (you should not have any arrow on the first line in my opinion). However he should be able to walk on the sides and the bottom tiles (half green and half white); those tiles should have three arrows.
Well, it would be easier if you took a look at the tiles which came by default with Essentials and copy their passability.
Regarding the lake, are you sure it is set with the terrain tag 7 (water)?