Obi Softbody - Stop Movement

[alms94]

  Hello, thanks for this amazing tool. It's very fun to use. I have some questions, I hope you can help.

1)I'm making a game like 3D Tetris. At start i want some objects to stay together like in the photo. But when I press play they are not standing together, they probably collides with eachother and goes away. 

2)The cubes are not standing on the ground, they act like they are on the ground, but they aren't. How can I solve these? Thanks for your help.