Looking at it, there are 2 images each of which have 2 pages.
The first appears to relate to Joseph Warren and it says he was admitted 24th June 1879 and died 30th June 1879.
The second, though there is no name, begins on 5th Oct 1889 and says he died at 11.40 pm 5th June 1891 so can't refer to Joseph Warren.
So, though its not 'quite right' the OP does say it matches the date and place of death on the death certificate.
If it were me, I'd email the holders of the records, explain the problem and ask if its possible to confirm that pages 295 and 296 'do' relate to John Watts.
Boo