When you have a bundle with multiple sections, you have the option to add conditional logic to the sections you have created.
Go to Bundles.
Select the bundle that you would like to edit.
Select Products, and scroll to Conditional Sections.
Setting up conditional logic affects how your products from each section interact with one another: it allows you to hide certain products from future sections if specific products have already been selected.
Under Conditional logic, select a rule based on the following options:
By selecting one of the above, you can set a rule for when a product is added to the bundle - select which product this rule applies to by clicking Add a product.
Under THEN HIDE, you can Add a product to hide from a following section of the bundle.