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Manx Genealogy

Question re will of John Killip,1764

Hi All
the above will, transcribed by Lois Ralph date 22/12/2004, source LDS 0106224, John is stated to have died 17/3/1764. Could this possibly really have been 11/3/1764 ? The Lonan burial register has a John Killip buried 16/3/1764, who I am hoping is both the above testator and the husband of Joney Killip als Cowin buried 14/3/1784.
As I understand it, the court date of 25/01/1764 at the bottom is AFTER the above date due to a hangover of the Julian/Gregorian conversion ?
Regards
John Killip