When using the standard Web to Lead Version of this Plugin my form is able to trigger the active assignment rule.
When using the API only the plugin fails to trigger the active assignment rule.
When using both the plugin triggers the active assignment rule and creates duplicate leads in the SFDC.
The API is strong however, I am going to assume that the same problem is going to occur when creating cases.
Perhaps there is a way in the coding to have a check box that triggers the web to lead or web to case form action.