Hum, it's me again.
On some rare occasions (although it happened twice in the game), it seems I can duplicate boxes when I stack items and a customer is bothering me and I try to leave the stacking mode.
In this picture, these are TWO boxes of D.I.Y. (I wanted to take a better picture, but the customers didn't feel like it)
Another bug: the background music can still play if Alt-Tabbed when someone wants to ask the manager.
