Changing the date created on a blog post.

Hi

I have recently stopped my bloggers from posting directly to the site, so now I manage all blog posts and when they should be posted.

I know how to set a publishing date and time for these, but the problem is that all the created dates stay the same, so if I post a newer article before an older one, then when on the site, the one that was created before will be below the one that was published before. Does this make sense?

So two blog posts, one written on 23/1 and one written on 28/1

First blog post (written on 23/1) is scheduled to publish on 30/1 at 10 am
Second post (written on 28/1) is scheduled to publish on 29/1 at 9 am

When they are both published, the first blog posts will be under the second blog post as it was written before the second blog post.

How do I get this to change?

Thanks