Double emails to admin

Good morning, I have version 2.0.3.1 and I wanted to ask something about email. I have enabled the settings to send new mail to admin on each new order. So, when a new order is made, admin recieve 2 emails, one of the system that shows the order and a copy of the email arriving to the customer. The same happens and when we change the status of the order, there are again 2 emails, one copy from the customer and one informative. How is it possible to get only one email when the order is made and not two and change the status to no one?

thank you for your time, Maria

I don't think OpenCart does this by default, so you must have an extension doing this.