Cache invalidation: The locket was cached but later substituted, resulting in stale information. Furthermore, a layer of indirection would ultimately conceal critical updates to the assumed ownership of a certain principal object.
Naming things: He wanted to live forever, but stuck himself with a name he invented as a teenager, and later banned its pronunciation. Also, another of the principal objects had a highly misleading name that tricked both the one who first received it and others later.
Off by one errors: u/[email protected] got it right, the auspicious number was spoilt by careless dilution. Meanwhile, the bearer of the third symbol escaped doom at his pleasure and contributed many an off-by-one (or two, or three) error to the occupancy of various rooms in the future.
I’m sorry for reminding you of an unpleasant experience. Though the offense you take it to be is remote in my eyes, I too was disappointed in various ways by the filmmakers’ adaptational choices.
The pictures were intended to support an additional humorous interpretation of the caption, which was a good joke on its own but probably too familiar to bear repeating without fresh context.