User blog comment:John Alfred Hammond, CEO/Civilized Talk on the Pointers to JP:TG as Canon/@comment-17754282-20141126213746/@comment-160529-20141126215635

the things they changed are called "continuity errors"

"continuity errors"are actualyl pretty common in fiction, even between movies and their sequels. In factI garuntee there are contuity errors between the Jurassic Park Films. IN FACT, thereare two goddang maps in the original film that show contradictory placements fo dinosaurs, one map showign the whole island being taken up and another showing the part as only a small portion of the island.

Contuity errors freaking happen....