I create categories like:

A
-- A1
-- A2
---- A21
---- A22
-- A3
B
-- B1
-- B2
C

But in new post on left side admin show wrong:

A
-- A1
---- A21
---- A22
B
-- B2
C
A2
A3
B1

Why? How I can fix it?

Code:

$id = wp_create_category('title', $parent);

Image :