Cannot enter "Valley of the Wind"

Hey guys. I got a big problem. I wanna go through Valley of the Wind but it is closed. I can open the first blue door but after that its closed. Just check the pictures. I checked some walkthrough videos on youtube and there where some differences between
my game and their game. I think i did the levels before the same way they did. Can anyone help me please. THX.

Here you normally can go into the water with a double jump. But as you can see its closed.



Here is normally no wall.



:)

 

Blighttown

Speaking of that awful, awful place; would anybody be able to help me through it? Currently I'm trying to enter through the Valley of Drakes entrance coming from Firelink.

 

I missed a spirit light container, am I boned for the No Stone Unturned Chivo? *spoiler*

In the Valley of the Wind section, I cleared the Forlorn Ruins. It is listed as 100% but I can see on the map I missed a Spirit Light Container (not an ability cell). I didnt notice until after i escaped from the bird and the rock fell so I can't go back
to the area at all. Are the SPCs something you need for the No Stone Unturned achievement?