Need some wordpress advice please

I am using a template for wordpress, 1024px, that I just noticed does something I don't like. When I put a post, it puts it in the categories section, which is normal, but when I click on that category I get only a few lines of the post showing, and in the browser is shows mydomainname.com/categories/page-title

Then if I click on the page title, that shows with the few lines of my post, it will then show the whole article, and mydomainname/page-title, which is what I wish it did in the first place.

Is this normal, and is there a way to correct it. I have one page set as a static home page. Everything else will be post's.

I definitely don't think I want this, because I don't think people will know what they are supposed to do, or won't want to bother.

I never noticed this because I set up about a dozen sites in the last two weeks, with just a home page, as a page. I only noticed this today when I was starting to add content to these sites.

I would like to stick with this template because it is clean and simple, and because I don't feel like redoing a dozen sites, but if there isn't a way to fix this, I guess I will have to.

Are posts that much more seo friendly than pages for blogs?

Thanks Glenn