lumoruk:
What the hell you shouldn't be putting the bag on the scales in front of the scanner. In fact i'm pretty sure the bag stays on the hook you put your stuff in then remove the bag and push it along the oversized scale. Sounds like you're doing it wrong. Can someone post a gif of "you're doing it wrong" please as i'm on my phone.
That's how it works in our metro, you cashier bags the items on the only available space which happens to be in front of the scanner. Don't think I've ever been overcharged though. Are you talking about the self scan tills? They don't have them in Metro stores I don't think.