Problem with direction.

[EliaquimNascimento]

I'm having problems with directions.

When I go Up(8) + Right(6) the player turns his direction to the right, but stills go up.
When I go Down(2) + Left(6) the player turns his direction to the left, but stills go down.
When I go Right(6) + Down(2) the player turns his direction to down, but stills go right.
When I go Left(4) + Up(8) the player turns his direction to up, but stills go left.

This is strange because the player can walk into a door that is in front of him while facing right for example.

Here is a video:
https://youtu.be/n7LbNZQVjMg