I understand your point crayola kiddies. The reason I said I didn't think it was due to an inexperienced provider is because I think changing hours is something that many providers do regardless of how long they have been open. This is something that any business encounters IMO not just hdc's. Hours open will change due to the hdcp's family needs as well as the dcparents need. When we have no parents needing late pickup's, it would naturally make sense to shorten our day for example.
I think the provider likely thought this family was leaving and was going to take the opportunity to shorten her workday while she could. When it turned out that the family wasn't leaving, she decided to shorten her day anyways. The grass looked greener with the teachers and who wouldn't take the chance to be done earlier if they could. It may not have been professional on her part by the way she handled the situation but we're not perfect and mistakes happen.