Australia NSW data does not match official sources

[Moult]

Official sources, I believe, are NSW health, found here:

https://www.health.nsw.gov.au/news/pages/2020-nsw-health.aspx

A small sample dataset I manually made from checking the pages on the above link results in:

Date	Confirmed
2019-02-25	4
2019-02-26	4
2019-02-27	4
2019-02-28	4
2019-02-29	4
2019-03-01	6
2019-03-02	6
2019-03-03	15
2019-03-04	22
2019-03-05	25
2019-03-06	28
2019-03-07	36
2019-03-08	40
2019-03-09	47
2019-03-10	61
2019-03-11	65
2019-03-12	78
2019-03-13	92
2019-03-14	112

Whereas the time_series_19-covid-Confirmed document currently has these values. I have put my data in brackets to show the contrast where there is a discrepancy.

2/29/20	3/1/20	3/2/20	3/3/20	3/4/20	3/5/20	3/6/20	3/7/20	3/8/20	3/9/20
4	6	6	13 (15)	22	22 (25)	26 (28)	28(36)	38(40)	48(47)

I am curious why there is a discrepancy? Is there another more official source?