1) Editing events is the same as editing posts. Just click the post with the event title and scroll down to the events panel.
2) you can change the slug or permalink to anything you like and it should work. We have a wide variety of people using alternate post and slugs (including our own sites). Can you give some exact steps to repeat the bug?
3) delete the post to delete an event.
We didn't bother documenting this as we specifically tied the action to the most basic actions in wordpress.
If you do end up writing a basic guide we would be happy to post it.