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That's normal, this was part of a promotion. There is another promotion where they sell two pizzas but divided into 4 portions, each one with different toppings.

Ah ok. That is an interesting way to market things and I like the idea. You get to taste various different pizzas.

That's right, it's like eating different pizzas. Of course you can also order a traditional pizza

I think it's a cultural thing! Here in Brazil for example is very common to have 2 toppings (or even more) on the same pizza

Ah ok. I was just a bit confused to see it.