Hello. I have this really weird problem when using a rigidbody2D to move my character. I am programming basic RPG 4-way movement using rigidbody2D.velocity. Everything works fine and dandy except for when moving in Horizontal direction. rigidbody2D.velocity.x totally freaks out when I get to a wall with a collision2D box on it. It does not happen with the y direction at all, only the x. When I print out the velocity.x i get a number as high as: 6.658959E-08, but it only does this if I mash the right or left key when my character stands next to a colliding wall.
I cannot figure out what causes this problem, is it my code? Or is it a physics setting in Unity? My code for moving my char is below, oh and this is my first crack at this, so it is not the most beautiful solution. I have scoured it several times, but have failed to see what I have done wrong, if I have done anything wrong. 
Thnx for the help 
using UnityEngine;
using System.Collections;
public class MainCharControllerScript : MonoBehaviour {
public float Speed;
//bool facingDown = true;
//bool facingUp = false;
bool facingRight = false;
bool buttonCheck;
Animator anim;
float moveHorizontal;
float moveVertical;
Vector3 vel;
// Use this for initialization
void Start ()
{
anim = GetComponent<Animator> ();
}
// Update is called once per frame
void FixedUpdate ()
{
//print (rigidbody2D.velocity);
moveHorizontal = Input.GetAxis("Horizontal");
moveVertical = Input.GetAxis ("Vertical");
// check direction
if(rigidbody2D.velocity.y == 0)
{
anim.SetBool ("directionUp", false);
anim.SetBool ("directionDown", false);
}
if (rigidbody2D.velocity.x == 0) {
anim.SetBool ("directionLeftRight", false);
}
if (rigidbody2D.velocity.y > 0) {
anim.SetBool ("directionUp", true);
anim.SetBool ("directionDown", false);
}
if (rigidbody2D.velocity.y < 0) {
anim.SetBool ("directionDown", true);
anim.SetBool ("directionUp", false);
}
if (rigidbody2D.velocity.x < 0 || rigidbody2D.velocity.x > 0) {
anim.SetBool ("directionLeftRight", true);
}
//anim.SetInteger ("SpeedH", Mathf.Abs ((int)rigidbody2D.velocity.y));
//anim.SetInteger ("SpeedV", Mathf.Abs ((int)rigidbody2D.velocity.x));
print (rigidbody2D.velocity.x);
print (rigidbody2D.velocity.y);
//print (moveVertical);
//rigidbody2D.velocity = new Vector2 (moveVertical * maxSpeed, rigidbody2D.velocity.x);
//make sure player cannot press two directions at once
if (Input.GetButton("Horizontal") && Input.GetButton("Vertical")) {
buttonCheck = true;
}
if (buttonCheck) {
moveHorizontal = 0;
moveVertical = 0;
}
if (!Input.GetButton ("Horizontal")) {
rigidbody2D.velocity = new Vector2 (0,0);
//anim.SetBool("WalkingLeftRight", false);
//anim.SetBool("WalkingUpTrue", false);
//anim.SetBool("WalkingDown", false);
}
if (!Input.GetButton ("Vertical"))
{
rigidbody2D.velocity = new Vector2 (0,0);
//anim.SetBool("WalkingUpTrue", false);
//anim.SetBool("WalkingDown", false);
}
if(Input.GetButton("Horizontal") && Input.GetButton("Vertical") == false)
{
buttonCheck = false;
//anim.SetBool("WalkingLeftRight", true);
if(moveHorizontal > 0)
{
rigidbody2D.velocity = (transform.right * Speed);
}
if(moveHorizontal < 0)
{
rigidbody2D.velocity = (transform.right *- Speed);
}
if (moveHorizontal > 0 && !facingRight)
Flip ();
else if (moveHorizontal < 0 && facingRight)
Flip ();
}
//anim.SetFloat ("Speed", Mathf.Abs (moveVertical));
if (Input.GetButton ("Vertical") && Input.GetButton("Horizontal") == false) {
buttonCheck = false;
if(moveVertical > 0)
{
rigidbody2D.velocity = (transform.up * Speed);
//anim.SetBool("WalkingUpTrue", true);
//anim.SetBool("WalkingDown", false);
}
if(moveVertical < 0)
{
rigidbody2D.velocity = (transform.up *- Speed);
//anim.SetBool("WalkingDown", true);
//anim.SetBool("WalkingUpTrue", false);
}
}
}
void OnCollisionEnter2D(Collision2D coll)
{
if (coll.gameObject.name == "Wall") {
print ("Coll!");
}
}
void Flip()
{
facingRight = !facingRight;
Vector3 theScale = transform.localScale;
theScale.x *= -1;
transform.localScale = theScale;
}
}