This makes sense~ without some kind of reporting standard, every jurisdiction is free to apply their own methodology and we're prone to receive inaccurate (or politically biased) information. That might mean inflating numbers, or deflating (as is the case with China, an enormous country with miraculously no infections or deaths since the day they coincidentally kicked all western journalists out).
New York changing their methodology out of the blue this week puts a curious asterisk on both the numbers we're getting from them now and the numbers we got from them previously. Why the sudden change?