ciciliaiskandar on "Custom CSS not working"

Hi sorry, I open my website already. So here's the thing, when I put that code in Mystile > Theme option > General > Custom CSS, it works (my border becomes red). But when I put it in Appearance > Editor > Child theme style.css, it didn't work?

Now I have deleted both code and the red border is still on?

Currently in my Custom CSS I have this code:

.post img, .type-page img {
border: none !important;
}

#header {
padding: 10px;
margin-top: 10px;
margin-bottom: 30px;
margin-left: auto;
margin-right: auto;
}

#navigation {
margin-bottom: 0;
}

#header #logo {
margin-bottom: 0;
}