A column with the divider has padding top set with Visual Composer that pushes it down a bit. Try to set padding top to 0 for that column to make it look better.
As for parallax, could you please check how it works with default WordPress theme to understand is it our theme issue or bug from Visual Composer?
Thank you, the solution works.
The parallax is actually working but it is very slow so changes are difficult to distinguish.
Btw, how can I disable new page creation when I want to edit an object in Front-end Edit with Visual Composer?
Whenever I click the edit button, it will always create a new tab to the homepage. Is that a Visual Composer issue? How do I disable it?