Your first point is not really a bug but you are right and this exact thing crossed my mind just couple days ago. I've just not gotten around to putting in measures to prevent users getting ahead of themselves.
I might put some notifications just above the Submit button. Or maybe a row of icons representing the most popular features i.e. content, title, custom fields, categories. That way when users arrived on the Create Posts screen there is a quick visual on what they may have missed.
Maybe i can use the icons from the WordPress admin menu :)
As for your second issue can you post the error please. I assume you reset a table, created a new project which used that table and it triggered error. Good find if so. ;)