domain pricing setting with enom


I run a WP multisite network and I am trying to sell domains with enom as provider.

I opened a enom reseller account and have set up the domain mapping plugin with my enom credentials.

I see on the enom domain pricing account manager that .com domains should be proposed at 21.97$ (with my costs at 15.36$).

But when a user of my network go in 'dashboard / domain mapping / purchase domain' tab and check the availability of a .com domain, he is proposed to purchase it at 34.95$ !?

Does anyone know what I could have done wrong ?