If you have been following daily reported death "headlines" for MA, it doesn't line up with the state's per-day graphs; see page 9 [0]. I assume they're investigating them and going back and updating the daily totals as the graph seems to lag a few days, but it's not clear to me what methodology they are using. They have been doing this for a while.

[0] https://www.mass.gov/doc/covid-19-dashboard-may-19-2020/down...