Aweber form API requiring optin on sign up forms

Ok - I am using the Hustle plugin, and even though in Aweber I have the required confirmation option set to OFF, people using the sign up form are still receiving a confirmation request. I am guessing that somewhere in the API between hustle and Aweber, that the fact that this is a web form is not being communicated. This is a deal breaker - is there anything that can be done to fix this? Or is there another way to use the plugin with aweber without the API? Another plugin that I use has you create the form in aweber, then paste the form code in.

The main reason I use Aweber is the ability to turn OFF the email confirmation for web forms.

Thanks!
Stacy