This question already has an answer here:
My wife and I want to visit India and decided to use Skyscanner.net as we usually do.
We obviously want to purchase our tickets together, and not separately.
If we set the number of travellers to 1, we get a price and then if we change the number of travellers to 2, we get a different, more expensive price.
Why? Is it a problem with Skyscanner?