how do I can set the front tilt without it influences the rear view? In other terms if I tilt down the frontal view, the rear view pointing up. Is it an issue or it is normal? Thanks.
No, looks like that's normal. I'm surprised you're pitching the camera down low enough to notice that though - you might want to check your seat position, or something. And the other side of the coin - just use your mirrors! I think a lot of people never 'look back' when driving. Mirrors are fine, especially with the optional virtual ones.