Impossible Shit

I have been busy at work with some impossible shit, old files that have been overwritten keep reappearing. For example, a grocery store does a weekly ad. This weeks ad overwrites last weeks ad, but the audio filename is the same. So the filename is something like grocerystore.WAV. Every day at the same time, the computer plays the ad, we jus re-record it. Well, suddenly, out of the blue, the old ad starts playing again. Several instances of this.

Not possible.....