What's included in LLC package?
MyUSAcorporation.com is better than the competition because it does not push any "packages" on its clients. Instead, every client can order a la carte the services that she needs. The $39 processing fee includes only the filing of Articles of Organization, which officially forms your LLC. There are additional fees for such popular services as obtaining a federal tax ID ($39), getting a registered agent ($99), and the kit & seal ($69) that you mentioned.
I suggest that you start the order process and take a look at the pricelist that appears on the very first page of the order form.