Naruto returns to Konoha in Shippuden and finds his room dirty. But later in the series it is revealed that Konohamaru cleaned Naruto's Room. Is this some kind of mistake or is that two completely different timelines?
When room is dirty
Naruto: Finally Home Sweet Home, The old place hasn't changed a bit. Oh, well bound to be a little dusty being closed up for a couple of years.
NARUTO SHIPPUDEN (Episode 7: Run, Kankuro)
When room is clean and spotless
Konohamaru: All Done, everything nice and clean now.
Sakura: Wow, you really cleaned Naruto's room.
Moegi: That's right , Naruto been away for 3 whole years and it really needed it.
Konohamaru: His place is spotless. It is ready to welcome him home >and so are we.
NARUTO SHIPPUDEN (Episode 422: The Ones Who Will Inherit)