More than one column and sidebars supported?

When I have more than one column, the content text overwrites the sidebar. I have tried setting the example width in the main setting, but still the same problem.

I’m using the TwentyTwelve theme, but I have also tried it with Oxygen and a few others and all have the same issue.

Is the program supposed to work with sidebars?

https://www.ads-software.com/extend/plugins/site-creator-ultimate/