The 1660 are not all "new." Per the state dashboard, almost 1000 of those are older results that were added in to the cumulative total.
Today, 16,215 antigen tests and 975 positive cases from July 28 through August 22 are being added to the cumulative reports. Moving forward, antigen cases and testing from the most recent 24-hour period will be included in the daily reports. Tests and cases from prior to July 28 will be added to the cumulative reports once they are verified.