What happens if instead of these two large buttons, you have "X"'s right-aligned after the checklist item name for removal?
And then a "+" where a checkbox would go in an empty row below the last item, which when clicked, would display a text input and an OK and Cancel button (like the fields in a review request) for adding a new item?
mike_conley:
Hm. That sounds less like "editing" and more like "adding".