In The Phantom Tollbooth,was it right for Milo to hide that a week had gone by?

Milo FEELS
like he has been gone several weeks. Remember that this is a fantasy, and time can be
manipulated.  The last chapter tells us that Milo is suddenly concerned that people may be
worried about him.

"...it suddenly occurred to Milo
that he must have been gone for several weeks." (pg 253)

However, when he returns home, he notices that it is only six o'clock, and he has only
been gone an hour. No one has even noticed...