Renata wrote:
....
... I probably figured for the additional item I didn't need to have an eagle eye. Silly me.


I'm certain it's not a case of deliberate attempt to commit fraud by
"the Evil BORG" as your first posting seems to imply...given the number
of items rung up by checkers, it's not surprising there are errors and
that you happened to have two occurrences in near proximity to each
other is simply chance.