Cart charges for shipping twice for one item

Hi – We are having trouble getting the cart in woocommerce to work correctly. It is creating orders that charge for shipping twice for each item. (2 items = 4 shipping fees) We are a site that uses 2 Print on demand services: Printify + Gooten. WE use the Gooten plugin, Printify operates differently.

When we get an order with items from both sources ordered the cart charges 2 times for shipping one item. Can you assist us to correct this glitch? ?

Here is the site: https://retrolifestylecompany.com

Thank you in advance.

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