I would like us to upgrade from 5 seats in Asana to 10 seats. I have tried to do this but the pricing does not makes sense. We pay $37.50 for 5 seats, but when I try to upgrade to 10 seats it says that it is an additional $97.40 for 5 more seats, for a grand total of $134.90. Why is there such a sudden jump? Is this a mistake?