What the {blog} is going on???

UPDATED UPDATE: Yay! Success! Both of the below-mentioned issues have now been corrected (thanks to some kind, anonymous, helpful folks on the message boards. Many thanks!) So, if you are so inclined, you can now go back and browse ALL previous blog posts, dating back to 2008.


UPDATE: After tossing my question out there into Blogger message board land, I received a solution to my main problem (with duplicate posts) that worked! It involved editing some HTML code, which made me feel incredibly techie, but was actually very simple. I am still trying to figure out how to get back all my missing archives, but may possibly have a solution to that problem soon, too. I will be sure to let you all know (because you're waiting on bated breath, I'm sure) if/when that gets corrected.
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Ok fellow bloggers, I need some help. Obviously, I changed the look of my blog a bit (although this template is not likely to stay for long, once I get some things figured out.) Anyway, I was messing around with other templates last night and in the process, ended up with a problem. (Warning: If you are not on Blogger, the following will probably not make any sense.)

Under Design — Page Elements, I now have the "Blog Posts" section (the main meat of the blog) listed twice.

So now, all my blog posts are repeating at the bottom of the screen. Scroll on down now and see for yourself.

For other widgets, you can just click on them and then "remove" them at the bottom of the screen (like this).

But I do not get the "Remove" option for the Page Elements block (probably because it's not a widget, it's the content of the whole darn blog.)

I have no idea how this happened and I cannot seem to get rid of it. Aaahhh! What do I do?

Also, while I'm at it, ever since I switched over from owenryanpeterson.blogspot.com to lettingourlightshine.blogspot.com, I lost about half of my archived posts. On here, it only gives me archives through August 2010. What happened to all the ones from before that (dating back to November 2008)??? They are still available on the old site (which is the main reason why I haven't completely deactivated that one), but I haven't figured out why they didn't transfer over with the rest of them and how to get them to.

Anyone out there that can help me with this?