Tarzan's chimp Cheetah dies aged 80

[cstanleytech]

14. The one I was refering to via the link said and I quote

Cheeta was a male chimpanzee born about 1960, formerly owned by Tony Gentry and was residing at the C.H.E.E.T.A. Primate Sanctuary (Creative Habitats and Enrichment for Endangered and Threatened Apes) in Palm Springs, California. Gentry claimed at various times that this chimpanzee was born in 1932 or later in the 1930s and succeeded Jiggs as the film Cheeta, portraying the character in most of the Johnny Weismuller and Lex Barker Tarzan films. He was alleged to have appeared in non-Tarzan films in other chimp roles as well, and based on the 1932 birthdate alleged by Gentry became celebrated as oldest living chimpanzee on reaching the supposed age of 64 in 1996 (chimpanzees typically live to be 40-45 in the wild). All of these claims were debunked in 2008 by journalist R. D. Rosen in an article that settled the animal's true age and established that he had not appeared in any movies, let alone in the role of Cheeta.[11] Cheeta died on December 24, 2011 of kidney failure at the age of 51.[12]


So maybe I need more sleep but if the date of death is the same doesnt that make the chimp only 51 and not 80?