In boy by roald dahi why is the gobstoker jar never behind counter?

In "The BFG" by Roald Dahl, The Gobstoppers jar is always behind the counter, not never behind the counter.

The Gobstoppers jar is a special jar in the BFG's cave, where he keeps his "gobstoppers", a fictional candy that is said to be delicious and never-ending. The jar is kept behind the counter, and the BFG gives some gobstops to Sophie throughout the story.