Sorry to hear that, can you please provide a bit more details on what problems you encounter to help me fix this?
What version of WordPress are you using and what version of bootstrap is your theme running? Can you describe in details what doesn’t work exactly?
You have to duplicate container which contain row and columns.
If You change column size for second container, the size column from first container is change too.
It seems, does not matter, which column size You change, the changes are applied for every columns.
But this issue is only for duplicated blocks.