cannot get boxes lined up, the stack and leave space

I just installed UpFront and Spirit. When I was first working on it I could put elements side by side - I need 3 columns. Now I cannot. When I try, it moves one below the other, and a big (unacceptable) blank spot where the elements should be.
I am under a SEVERE time crunch for this project, and installed this theme because it looked like it was better/easier to work with than the Be Human theme/page builder.
I need some help.