Hi Tony,
As the residence given at his death in 1853 was the same as in the 1851 census I don't think there is any doubt that your Robert Corkill died in 1853, not in 1859.
See: www.isle-of-man.com/genealogy/messageboard/index.pl/md/read/id/553696
And for the earlier family:
www.isle-of-man.com/genealogy/messageboard/index.pl/md/read/id/554148
I can't find a Robert Corkill buried 1859 in Tom Corteen's Maughold parish reg. transcripts?
Sue