Spar?

There is a chain of food shops here in Switzerland called Spar, meaning save. And I guess they have cheaper prices than other stores. But today I was a bit disappointed.

I was on my way home being hungry, and needed to shop for food, I was planning to cook but needed an energy boost immediately. Saw this package of two sandwiches, prices 2.40 and with a sticker saying 50%. Neat.

But when I got to the cashier I turned out that 2.40 was half the price already. I'm not entirely sure it's legal to have a price tag saying 2.40 and another saying 50%, meaning the discount is already taken off.

But ok, I bought it, I'm not gonna sue them :), after all I'm not American, but still. It bugs me. And I think I'll stick to Coop and Migros in the future.