Different buyer fees for extended license

Hey everyone. I need some explanation please.

I’ve made few TCG card templates and I put all of them in a category Print Templates > Misc…

The Buyer fee for an extended license there is 50$.

Right now I finished my new TCG template and this time I tried to put it in a category Game Assets > Misc…

To my surprise the Buyer fee for an extended license there is only 15$.

The text in extended license is the same for both categories: Use, by you or one client, in a single end product which end users can be charged for. The total price includes the item price and a buyer fee.

So my question is: Am I missing something or is this a mistake on Envato side?

@Envato: If the answer is, that it is category based, then why you take 50 for one category, while you are ok with 15 in another?

Thank You for your answers.

Jan (survivor)