Rigidbody container is spilling out contained rigidbodies I am trying to make a simulation where I have a container and it is getting filled with more rigid bodies (Soccerballs) falling from above. The container gets filled fine but when I try to animate the container itself from one location to another the contained Rigidbodies spill out from the containers sides .. 

the soccerballs are relativly small in size, I don't know if this is the reason for the problem.

I have tried the following solutions but with no use, balls still spill out from the container.

1- I have changed the container collision shape sensitivity margin.
2- I have changed the balls collision shape(the problem got worse)
3- I have tried changing friction and bounciness of the balls 

How can I solve this problem, what settings can I change that might help?

thanks in advance for your answers, I am sorry that the question got too long.
Within the Scene properties are the Rigid Body World settings. This includes a Steps Per Second property. This setting determines how often blender should check the position of objects in the scene for how they should interact - faster moving objects require a larger number of steps to prevent them passing through each other before Blender detects the collision.