INSERT 0 1 "problems"

Hi there,

how comes that sometimes, when I use something like this:

psql name_of_my_database < inserts.sql

Postgres displays

INSERT 0 1
INSERT 0 1
INSERT 0 1

but sometimes it counts

INSERT 48593 1
INSERT 48594 1
INSERT 48595 1

???

Although all data are being inserted, I would like to do a "clean"
job and see the counting for all inserts...

Any hints are very much appreciated!!