It was brought to my attention that I left out a bit of information needed to make the two sidebars work. If you haven't read Two sidebars in blogger - Part 1, read it first. The part that slipped my attention is buried deeper in the template. You have a section of code that should read:
<div id="sidebarleft"><div id="sidebar2">Simply add this after all the content in your left sidebar:
<div id="sidebarright"><div id="sidebar2">
Be sure to add a matching </div> for each <div> that is added (that would be two for each sidebar) to close the tags.These are placed at the end of your sidebar code. Otherwise things will get crazy fast. Now you add content to that sidebar as you have before (ie where you want the content to be seen in your blog). Sorry I didn't notice that omission before.
With all that being said, it seems each blog has it's own idea of how it will allow another sidebar to be introduced into the mix. When I added the second sidebar to by blog, it was very simple...cut and paste and it was a done deal. I recently helped a friend add a second sidebar to his blog. He also uses the same template as I, Minima. For some reason, it was extremely difficult. But, after a few glasses of wine and sleeping on it, I managed to make it happen. So, there is no rhyme or reason (at least to me, a person with no training) for why or why not something will work. If you are trying to add a second sidebar to your blog and it is just not happening as you had hoped, email me and I'll see if I can help. Not promising anything, but I do enjoy a challenge.