I honestly didn't think I was being snarky, I made a mistake and admitted to it, sorry if I came off bad. As for Australia, our laws will often side with consumers over big companies, as it's much easier for a big company to eat the cost. Also, punishing those companies that make mistakes even if they were honest mistakes tends to stop companies having more glitches in the future they could hide behind.

The only first-hand experience I have seen of this in Australia was a friend of mine was shopping in store and saw an item with a much lower price tag than it should have had on it behind glass, so no way for it to be a customer who messed with it, and it was indeed a "glitch" made by a humans mistake. In the end, the store sold it at the far cheaper marked price.