My mistake, in rereading the article I linked to is not the one you referenced, however, it would seem to be an article based on an interview with the shooter.
My take is that the article you read referenced the record as a matter of reference, rather than a retelling of the record setting event, and as such, a few small details, not important to what that author was trying to convey, were left out.
Almost ALL records seem immpossible/unbreakable, right up to the point they are