Celsie, I recommend you email them and ask them about it. There's always a chance that they brought out a new size which is supposed to be cheaper, but the shop didn't change the label or put the wrong product in that spot on the shelf. It would be a shame for the manufacturer (who do make great products!) to be publicly criticised for a mistake made by a retailer.

I'm not saying that this is the case, but if it was me, I'd want to check it out first.