Multithemes "Plan" Theme Columns Not Working

UPDATE: Go figure! I quit and restarted RW and that fixed the problem.

I’m not sure if Ive done something wrong, or if there’s a problem with the theme. No matter what number column stack I add, or where I add it on a page, the columns do not go side-by-side. It’s like something is blocking the left side and stopping the columns from filling all the way left. The theme’s demo site appear to work correctly, but it also appears to have been made using an older version for RW and stacks, as well as some obsolete stacks. Here’s my test page:

Here a screen shot of my setup: