Is it possible she expected you to pay two weeks, in advance, then every two weeks?
I find it hard to believe a provider would be willing to front two weeks of care due to a job change.
The posting is "unprofessional" according to the updated *private childcare training classes, but effective according to long term business practices in earning an income.
What is deemed professional seems to change from generation to generation.
The literal definitions are awesome if you have some free time.
Some examples:
"undertaken or engaged in as a means of livelihood or for gain: "
"a person who earns a living in a sport or other occupation frequently engaged in by amateurs:"