Hi there -
Somehow I must have tweaked my code on the single page entry to allow for all my old posts to show up at the end of any single post page.
It may sound confusing but is as easy as pie to understand when you see a page: http://www.la8.com/2007/02/17/hello-world/ -- just scroll down. You will see all posts repeated.
Here is the link to see the code of the "single.php" page I am using from this theme: http://www.la8.com/wp-content/themes/blu3zin3-10/single.txt
I don't see how I could have screwed it up. Also, when I change themes back to default, etc. it also happens.
Thanks for your help.