Bertha (Rosenstein) and Harry Fleisher Death Certificates

Below are Bertha and Harry Fliesher's death certificates. Bertha was Adele (Kadetsky) Rosenstein's oldest child. Both Bertha and Harry died in their 40s. I noticed that Adele and Joseph Rosenstein's 1930 US Census listed their grandchildren, Irving (14) and Helen (11) as living with them. Now with these death records, I see that both parents passed away shortly before the 1930 census. The 1920 census for the Fleishers lists them as living in North Carolina. The head of the household was Harry, Bertha is listed as the wife and the 2 children Irving and Helen are listed as well. Notice that the mother's maiden name on Bertha's death certificate is not Kadetsky, but there are many other records that indicate that this was Adele's daughter.