I'm not sure what you mean by "it is charging me on the backend", but here is the typical shipping flow:
1) Customer pays the shipping fee you set.
2) You pay the shipping company to ship the items.
Ideally the fee you charge is higher than your actual shipping fee, but you can play around with this (for example giving free shipping at a certain threshold makes sense because of the additional profit from higher product sales).
Founder of
Speed Boostr (Shopify optimization experts, theme customization, custom app development).
Creator of
Shopify Analyzer (first performance analysis tool for Shopify sites, free for the Shopify community).
Creator of
Order Automator (auto tag orders and customers + auto fulfill orders + email notifications).
Creator of
Theme Scientist (A/B testing app) and
Tip Jar (add a tip button to your store).
