If this option is enabled Komet Sales allows E-commerce customer users to change custom product packs when creating an E-commerce order with Vendor Availability products.
Go to Setup >> Customers.
Search for the customer account, under Actions column and select Edit.
The "Customer Information" window will pop-up.
Under the Setup tab, click on the link: "Advanced".
Go to the "E-commerce Settings" section and configure the "Allow changing custom product packs" . The company user can see more information about this field by hovering over the "What's this?" link. After finishing, click on "Save".