Problem with collisions

Hey guys, i am making a game with boxes. I am moving the boxes with forces, not with collisions, I mean you can't run into a box in order to move it, you need to hit a key. You can pull or push a box. The problem is when I'm pulling a box towards me and walking with the camera to the box, the box starts moving forwards, than it enters other boxes until it reaches the wall, than the box start jumping. I've tried to reset the isKinematic, the velocity, nothing helps... Thanks in advance.