Unity5 Alignment with parent (weird)

Hey I'm having Issues with my parent and child alignment, I just can't figure it out for nothing.

I have my mars rover drop from a ship. But for some reason, when the rover hits the ground and lands, when I go to rotate the child, it starts turning in quirky motions like what's in the picture.

I've tried and checked the following

• Checked Rotation

• Checked Axis Position

• Remade vehicle 3 times

• Tried Using an empty (still does it)

I just can't understand what my problem is. It was working fine earlier until i added wheel colliders. So I removed wheel colliders and went back to old just single Box Collider covering entire Rover and still having this issue.

It's only when I hit the terrain , it works fine until then, but something about the Physics and Terrain knocked it out of alignment, but why would it knock it out of alignment? It's just a child of it, so why would it rotate all weird like? Shouldn't it follow the Parent (Rover)'s every movement?