How can I fix a shipping setup issue on my new online store?

[JinBox]

Hi everyone! I’m new to shopify. I really have a hard time figuring out about shipping. I have an item that if you purchase it I offer free shipping. For example: Free shipping with a purchase of Box Exclusive ( my main product). I have added it in the shipping that it’s free however when I tested to checkout and added a box and a shirt, the shirt was calculated at checkout. Customer will be confused coz my announcement is free shipping with the box exclusive purchase. Please HELP! How do I go through the settings? 

[Anindita]

Hi @JinBox 

Seems like you configured more than one shipping profile. However, before suggesting you some changes, it will be great if you share some of your shipping setup screenshots for a better understanding.