If you agreed on something and she's still crossing the line, give her some space and time to integrate this new behavior.
Sometimes it takes some repetion and revisiting the same issue a few times before new behaviors are really grounded.
Don't be too impatient with her. She's a human being, so give her space for imperfections.
Next time she does something you disaprove with, repeat this mantra to yourself:
"She is not perfect and that's ok"
"I am not perfect either"