Kudos to her for sticking to her guns.
A) She's not angry at the pastor, she's angry at Applebee's management. In fact, she almost feels sorry for the pastor, apologetic that the PASTOR made a mistake. She does not apologize for posting the receipt.
B) She's not sure she even wants that job back. That's good for whoever her next employer is, who will get a quality honest employee.
C) If the pastor didn't want her note to be seen, she wouldn't have written it.