需要帮助确定为什么rails 3 app mailer发送2封电子邮件而不是1封电子邮件

I am trying to testing sending email in my rails 3 app, and am testing with cucumber/rspec. In my test, I want the user to be able to receive an email, but instead of sending one, it is sending two. Here is my feature:I am trying to testing sending email in my rail