Blogger display failure: help wanted.

First of all, I am sorry if the display looks strange. Everything is NOT meant to be in one vertical column with the sidebars beneath the posting text. I did not put it that way and have no idea why it is that way. So, I have a request: if you do know how these things work and have some advice regarding how to restore my formatting to its usual self, please advise me in a comment post or email so that I can correct it.

Note that before this re-formatting occurred, I did nothing to change it. All I did was post - and note the alteration.

Thanks very much for your help in advance.