Elements disappear when manipulating the xml. Checkout_Cart_iten (Cart)

[conta1231gcd12]

Whenever I try to move or remove a block, some elements on the page just seem to disappear. The cart page is being too complicated for me, I don't understand why this is happening. The price next to the product adds up every time I move a block.

https://ibb.co/YfwjzfZ 

[shavetaran8e04]

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