Google indexing my wordpress custom theme weird

I have a site using wordpress up about a geo-targetted niche.. i put up a hand-written 600 word keyword optimized post. So, I have www.example.com as the main page showing the post, then www.example.com/keyword-post using %postname%

Google indexed my www.example.com/keyword-post

as

"Title >> Blog Archive >> Post Name"

which is weird because my custom theme is ultra stripped down and the HTML source generated has 0 trace of the words "Blog", "Archive", or the characters ">>".

One last question which I think I know the answer to, but i'll ask anyways.

I had the meta description pulling the wordpress "description" field (being the slogan line under the main title) but Google indexed me with it's own description it pulled from the first few lines of the post itself.. if I want my own custom description, should I hand-write it instead of using

<meta name="description" content="<?php bloginfo('description'); ?>" />
?

Lastly, should I set the www.example.com/keyword-post as noindex to avoid duplicate content as the same post is on www.example.com as well as www.example.com/keyword-post ?

Appreciate the answers, I'll make sure and give thanks to any helpful posts!

Not sure about the title issue, but whether you write your blog description or wordpress generates it, it looks the same to google.

I wouldn't recommend no-indexing example.com/keyword-post - as soon as it's off the home page of example.com (if/when you've added more blog posts) no one will find it in google.

Are you using a wordpress SEO plugin? If you are, check that.

Nope, no plugins. It's as stripped down as a wordpress blog can get- A header/description, 1 page, sidebar being a few relevant links, and a 600 word article.