Very disappointed discovery

I was very surprised today to find out that the Today 30 Sausage rolls box only had 26 pies in it. The thing that upsets me about this whole ordeal is the fact that what happened to all other times I bought these pies and did not bother to count them?

I feel cheated and not because I had 4 missing pies but purely because of the principle: If you tell me you giving 30 pies for an X amount of money, that is what I expect to get.