The information provided by an Informant on the death certificate can be incorrect. It isn't verified.
Also it is not unusual for WWI Draft Registration cards to be off one year.
Mrs. Anna Jones
Born: 20 Aug 1883, Lancaster Co. PA
Father: Wm Alexander b. Lane Co. PA
Mother: Sarah Anderson, b. Lancaster Co. PA
Spouse: Harry D. Jones
Res: Holtwood, PA
Informant: Vincent Jones, Holtwood
Died: 26 Aug 1941, Martic, Lancaster, PA
Buried: Aug 28, 1941, Dry Wells Catholic Cemetery
Source: PA Death Certificates 1906-1964
Dry Well cemetery is now the St. Catherine Cemetery, www.catholic-church.org/scsq/history.htm
Henry Daniel Jones
Born: 6 July 1884, Cambria Co. PA
1942 Residence: Martic, Lancaster, PA
Nearest Relative: Paul Jones, son, Holtwood
Occ: Self-employed farmer, Martic
Source: U. S. World War II Draft Registration Cards 1942
I didn't find Henry/Harry's death info but you already have it. I'd look for his burial at St. Catherin'e Cemetery. Successful Searching!