The order of PLIs is based on the "Sequence" field, administrators must define the sequences accordingly to ensure the correct PLIs are resolved on Catalog and Pricing.
If a product has multiple price list items (PLIs) with the same charge type, the catalog page shows those products in the order of their sequences in the PLIs. The PLI with the lowest sequence number appears first on the catalog screen. When you add a product from the catalog screen, the system prioritizes the sequence defined in the PLI charge type picklist metadata to display the products in the cart grid.