I had the same problem for a while, columns 1 & 3 (WP calls them 'Sidebar 1' & 'Sidebar 2') both appearing on the left side. Tried a few things that didn't work. Then I stumbled onto the solution by accident. Seems kinda embarassing. I increased the width of the browser that the page displays in. At a point when the blog page decides there's enough width in the browser, Sidebar #2 pops over to the right-hand side. D'OH!! If I increase real wide, then gradually decrease real narrow, then increase wide again, I can see how the layout is flexible and is trying to accomodate these actions. For example, if I make the browser width narrow enough, then NEITHER sidebars appear to the side, they both appear BELOW the posts, all in a single line (as in 1 column). It's actually a pretty cool effect that someone somewhere long ago probably had to struggle with CSS to get it to work this way. BUT PERHAPS I AM NOT SEEING THE WHOLE PICTURE (so to speak)? Is there a way in the WP Theme to lock the sidebars in place so that the "flexibility", as I call it, is no longer there ? I might not mind changing it to that mode if it is possible.