If you have tried to edit a post and found that you keep creating new posts, then here's a work around.
I added this as a comment to a post on The Farmer's Wife blogs, so thanks for reminding me to post it.
When you look at a post you will see an edit just under where is says 'posted ... ago'. DON'T use this one, you will get a new post when you hit post.
You can also see an edit for the post when you look at all blogs. DON'T use this one either, you will get a new post when you hit post.
The trick is to go into the post where you would see the comments and choose the edit underneath the comments. That way you actually edit the post and don't create a new one.
Regards, Ian