animated box always move

edit

I followed the animated box tutorial and everything works fine.

Then I tried to go further to control the movement of the box but I found it does not work.

For example, I wrote

  key = this->anim->CreateKeyFrame(30.0);
  key->Translation(ignition::math::Vector3d(0.0, 10.0, 10.0));
  key->Rotation(ignition::math::Quaterniond(0.0, 0.0, 0.0));

  key = this->anim->CreateKeyFrame(160.0);
  key->Translation(ignition::math::Vector3d(0.0, 10.0, 10.0));
  key->Rotation(ignition::math::Quaterniond(0.0, 0.0, 0.0));

That means I want the box will be static between 00:30:00 - 02:40:00. However the box continues to move, slowly but steady. I comment out nearly all parameters in .world file but everything remains the same.

Is there anyone know why this happen and how to fix that problem?