Open up the post you want to delete. Once the new screen comes up, click the edit button, and a new screen will come up and then right below the dialogue box you will see 5 square boxes and one is "delete this post" check it and then click submit, it'll ask are you sure? click yes and it will be deleted.
If only editing, open up the post you want to edit. Once the new screen comes up, click edit and a new screen will come up, change what you want in the title or dialogue box and then click submit and it'll be changed.
The Deputy riding shotgun