That's not the DNC, that's the New York Board of Elections. The DNC doesn't run the actual voting of the primaries, that's done by the local election commission

That's not the DNC, that's the New York Board of Elections. The DNC doesn't run the actual voting of the primaries, that's done by the local election commissions, just like for the general elections. This varies by state, it's generally the state parties that decide how primaries are run in their state, not the DNC.