Re: How was it basically the VPs fault?
This is not a mistake. This forced everyone to go down most of the aisles, thus increasing impulse buys. I've never been, but doesn't IKEA do something similar in their big box stores? It's also the reason the milk is almost always in the back of the store. In the USA anyway. Just need some milk? Why not look at all of the other things you could be buying. And it is why the candy is at the checkout lane, even the self-checkout.
Some big stores do a 'quick station' at the front with milk and bread now. And advertise the special candy free lane for shoppers with young children. Or me, who shouldn't buy a candy bar.